What is Html5 | HTML 5 Will Affect SEO | What HTML is not | History of search engines | Seo for Wordpress
What is HTML5?
HTML5 is a language for structuring and presenting content for the World Wide Web, a core technology of the Internet. It is the latest revision of the HTML standard (originally created in 1990) and currently remains under development. Its core aims have been to improve the language with support for the latest multimedia while keeping it easily readable by humans and consistently understood by computers and devices (web browsers, parsers etc.). It adds a great Multimedia and Semantic Web capability to the internet!
Following its immediate predecessors HTML 4.01 and XHTML 1.1, HTML5 is a response to the observation that the HTML and XHTML in common use on the World Wide Web is a mixture of features introduced by various specifications, along with those introduced by software products such as web browsers, those established by common practice, and the many syntax errors in existing web documents. It is also an attempt to define a single markup language that can be written in either HTML or XHTML syntax. It includes detailed processing models to encourage more interoperable implementations; it extends, improves and rationalizes the markup available for documents, and introduces markup and APIs for complex web applications.
In particular, HTML5 adds many new syntactical features. These include the <video>, <audio>, and <canvas> elements, as well as the integration of SVG content. These features are designed to make it easy to include and handle multimedia and graphical content on the web without having to resort to proprietary plugins and APIs. Other new elements, such as <section>, <article>, <header>, and <nav>, are designed to enrich the semantic content of documents. New attributes have been introduced for the same purpose, while some elements and attributes have been removed. Some elements, such as <a>, <cite> and <menu> have been changed, redefined or standardized. The APIs and DOM are no longer afterthoughts, but are fundamental parts of the HTML5 specification. HTML5 also defines in some detail the required processing for invalid documents, so that syntax errors will be treated uniformly by all conforming browsers and other user agents.
Markup
HTML5 introduces a number of new elements and attributes that reflect typical usage on modern websites. Some of them are semantic replacements for common uses of generic block (<div>) and inline (<span>) elements, for example <nav> (website navigation block), <footer> (usually referring to bottom of web page or to last lines of HTML code), or <audio> and <video> instead of <object>. Some deprecated elements from HTML 4.01 have been dropped, including purely presentational elements such as <font> and <center>, whose effects are achieved using Cascading Style Sheets. There is also a renewed emphasis on the importance of DOM scripting (e.g., JavaScript) in Web behavior.
The HTML5 syntax is no longer based on SGML despite the similarity of its markup. It has, however, been designed to be backward compatible with common parsing of older versions of HTML. It comes with a new introductory line that looks like an SGML document type declaration, <!DOCTYPE html>, which triggers the standards-compliant rendering mode. As of 5 January 2009, HTML5 also includes Web Forms 2.0, a previously separate WHATWG specification.
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Improved page segmentation. Search engines are getting smarter and there are many reasons to believe that even now they are applying page segmentation. Basically, page segmentation means that a page is divided into several separate parts (i.e. main content, menus, headers, footers, links sections, etc.) and these parts are treated as separate entries. At present, there is no way for a Web master to tell search engines how to segment a page but this is bound to change in HTML 5.
A new <article> tag.
The new <article> tag is probably the best addition from a SEO point of view. The <article> tag allows to mark separate entries in an online publication, such as a blog or a magazine. It is expected that when articles are marked with the <article> tag, this will make the HTML code cleaner because it will reduce the need to use <div> tags. Also, probably search engines will put more weight on the text inside the <article>
tag as compared to the contents on the other parts of the page.
A new <header> tag.
The new <header> tag (which is different from the head element) is a blessing for SEO experts because it gives a lot of flexibility. The <header> tag is very similar to the <H1> tag but the difference is that it can contain a lot of stuff, such as H1, H2, H3 elements, whole paragraphs of text, hard–coded links (and this is really precious for SEO), and any other kind of info you feel relevant to include.
A new <footer> tag.
The <footer> tag might not be as useful as the <header> one but still it allows to include important information there and it can be used for SEO purposes as well. The <header> and <footer> tags can be used many times on one page – i.e. you can have a separate header/footer for each section and this gives really a lot of flexibility.
A new <section> tag.
The new <section> tag can be used to identify separate sections on a page, chapter, book. The advantage is that each section can have its separate HTML heading. As with the <article> tag, it can be presumed that search engines will pay more attention to the contents of separate sections. For instance, if the words of a search string are found in one section, this implies higher relevance as compared to when these words are found all across the page or in separate sections.
What HTML is not
It's not like print. In print both text and images are embedded into paper as colored dots. On the web images and text are handled differently.
Images are sent as discrete files over the net to be displayed as illuminated color pixels on your monitor. Text is displayed as text.
The image to the right is a file named "tangent-galvanometer.gif". This page, an HTML file named "what-its-not.htm", requested that tangent-galvanometer.gif be sent from my server to your computer. Next it was positioned on the screen and this text wrapped around it.
Why not simply define the color of each and every pixel and have the page uploaded as one big image? There are two reasons:
Webpages would be too big – they would take too long to download.
The spiders, such as Googlebot, would not be able to read them. The words "Tangent Galvanometer" in the picture on the right is embedded in the image and therefore invisible to the spiders.
On the other hand this line of text is visible to the spiders* and has been entered into the search engine databases.
Those of you coming to web design from having worked in print will find web design quite different – not impossibly so, but it is different. It's not like math.
HTML 5 is no new Geometry. There is an order and logic to math that computer science aspires to but can not match.
In the last couple of decades some smart people made – and continue to make – HTML from scratch. On the whole they have done a good job. HTML 5 is certainly better than HTML 2, 3 or 4, but it is flawed and those flaws tend to raise their ugly heads at the most exasperating moments. Be prepared.
There will be times when you ask: "What idiot thought this up?". That idiot is probably alive and well – and making millions in Silicon Valley. However you can take some small comfort in the fact that your irritation might well be warranted.
Do not expect the elegant perfection of Euclid's Geometry and you will not be disappointed.
Common Principles search engine
To understand SEO you should be aware of the architecture of search engines. They all contain the following main components:
Spider - a browser-like program that dismisses web pages.
Crawler - a program that automatically follows all links on any web page.
Indexer - a program that analyzes web pages downloaded by the spider and crawler.
Database-storage for downloaded and processed pages.
Results engine - Search Results extracts from the database.
Web server - a server that is responsible for interaction between the user and other search engine components.
Implementation of specific search mechanisms may differ. For example, + Spider Crawler + Indexer component group might be implemented as a single program that downloads web pages, analyzes them and then uses their links to find new sources. However, the components listed are inherent to all search engines and SEO principles are the same.
Spider. This website program downloads as a web browser. The difference is that a browser displays the information presented on each page (text, graphics, etc.) while a spider does not have any visual components and works directly with the underlying HTML code of the page. You may know that there is a standard Web browser option to view HTML source code.
Crawler. This program finds all links on each page. Its task is to determine where the spider should go either praising or alloys based on a predefined list of addresses. Crawler follows these links and tries to find documents not already known to the search engine.
Indexer. This component parses each page and analyzes the various elements, such as text, headers, structural or stylistic features, special HTML tags, etc.
Database. This is the storage area for data search engine downloads and analyzes. Sometimes it is called search engine index.
Engine results. Engine results page rank. It determines which pages best match the user's request and in a way that sites should be listed. This is done in accordance with the search engine ranking algorithms. It follows that page rank is valid and interesting property and any SEO specialist is most interested in, when trying to improve his site search results. In this article, we will discuss the factors that affect SEO on site in some detail.
Web server. Search engine web server usually contains a HTML page with an input field where the user can specify the search query he or she is interested in web server is also responsible for displaying search results to the user in the form of an HTML page.
Page Web layout factors relevant to SEO
The amount of text on a page
A page consisting of only a few sentences is less likely to get to the top of a search engine list. Search engines favor sites that have a high content of information. In general, you should try to increase the text content of your site in the interest of SEO. Optimal size pages 500-3000 words (OR 2000 to 20,000 characters).
Search engine visibility is increased as the amount of page text increases due to increased probability random and accidental search queries causing it to be listed. This factor sometimes results in a large number of visitors.
The number of keywords on a page
Keywords should be used at least 3-4 times in the text of the page. Upper limit depends on the size of the overall site - great site, more keyword repetitions can be made. Keyword phrases (word combinations consisting of different keywords) are worth special mention. SEO best results were observed when a keyword phrase is used several times in the text with all keywords in the phrase arranged in exactly the same way. In addition, all the words of the phrase should be used separately several times in the remaining text. There should also be a difference (dispersion) in the number of entries for each of these repeated words.
Let's take an example. Suppose we choose a site for the term "SEO software" (one of our SEO keywords for this country) it would be better to use the "SEO software phrase" in time 10 text, the word "SEO" 7 times elsewhere in the text and the word "software" 5 times. numbers here are only for illustration, but they show the general idea of SEO quite well.
SEO Keyword density 2.1.3 and
Page Keyword density is a measure of the relative frequency of the word in the text expressed as a percentage. For example, if a specific word is used 5 times in a page containing 100 words, keyword density is 5%. If a keyword density is too low, the search engine will not pay much attention to. If the density is too high, the search engine may activate its spam filter. If this happens, the site will be penalized and its position in search listings will be deliberately lowered.
Optimum value for keyword density is 5-7%. In the case of keyword phrases, you must calculate the total density of each specific keywords that include phrases to make sure it is within limits. In practice, a keyword density of more than 7-8% does not seem to have any negative consequences SEO. However, this is not necessary and can reduce the readability of content from a user's point of view.
Format Text and SEO
Search engines pay special attention to page text that is highlighted or given special formatting. We recommend:
«TITLE» tag
This is one of the most important tags for search engines. Make use of this fact in your SEO work. Keywords should be used in the title tag. Links to your site which is usually shown in the search results will contain text derived from the title tag. It functions as a kind of virtual card business for your sites. Often, TITLE tag text is the first information about your website that the user sees. This is why it should not only contain keywords, but also be informative and attractive. You want researchers to be tempted to click on your link listed and navigate your website. As a rule, 50-80 characters of the title tag are displayed in the search results so you should limit the size of the title in this length.
«ALT attributes on images»
Any page image has a special optional attribute known as "alternative text." Is specified using the HTML «ALT» tag. This text will be displayed if the browser fails to download the image or if the image display is disabled browser. Search engines save the value of image ALT attributes when they Parse (INDEX) sites, but do not use it for ranking search results.
Currently, the search engine Google takes into account in the account text alt attributes of those images that are links to other sites. ALT attributes of other images are ignored. There is no information about the other search engines, but we can assume that the situation is similar. We consider that keywords can and should be used in alt attributes, but this is not vital for SEO purposes.
Keywords Meta tag
This Meta tag was initially used to determine the keywords for the page but is hardly ever used by search engines now. It is often ignored in SEO projects. However, it would be advisable to specify this code only if there is a resurgence in its use. Following rule must be observed for this tag: only keywords currently used in the text should be added to the site.
Site Structure
Number of pages
The general rule is SEO: the more, the better. Increase the number of pages on your website increases the visibility of the site for the search engines. Also, if new information is constantly being added on the site, search engines consider this as the development and expansion of the site. This can provide additional advantages in ranking. You should periodically publish more information on your site - news, press releases, articles, helpful tips, etc.
Keywords names on the page
Some SEO experts consider that using keywords in the name of a HTML page file can have a positive effect on the position of its search results.
Avoid subdirectories
If there are no more pages to your site (up to a few dozen), it is best to place them all in the root directory of your site. Search engines consider such pages to be more important than those in subdirectories.
One page - one keyword phrase
For maximum SEO strives to optimize each page for its own keyword phrase. Sometimes you can choose two or three related phrases, but you should not try to optimize a page for 5-10 phrases certainly at the same time. Such phrases would probably produce no effect on the page.
SEO and Main
Select the home page of your site (domain name, index.html) for word combinations that are the most important. This page is more likely to get on top of search engine lists. My SEO observations suggest that the main page may account for up to 30-40%% of total search traffic for some countries
Common SEO Mistakes
header graphic
Very often sites are designed with a header graphic. Often, we see an image of the busy company logo full-page width. Do not do it! Off the top of a page is a very valuable, where you need to enter your most important keywords for better SEO. In case of a graphic image, that prime position is wasted since search engines can not make use of the images. Sometimes you may come across completely absurd situations: header contains text information, but to make his appearance more attractive, it is created in the form of an image. The text can not be indexed by search engines and so will not contribute to page rank. If you need to submit a logo, the best way is to use a hybrid approach - place the graphic logo at the top of each page and size it so that it does not occupy its entire width. Use a text header to make up the rest of the width.
Graphic navigation menu
The situation is similar to the previous one - internal links on your site must contain keywords, which will give an extra edge in the SEO rankings. If your navigation menu consists of graphic elements to make it more attractive, search engines will not be able to index text links. If it is not possible to avoid using a graphic menu, at least remember to specify correct ALT attributes for all images.
Script navigation
Sometimes scripts are used for site navigation. As a a SEO worker, you need to understand that search engines can not read or execute scripts. Thus, a link specified with the help of a script will not be available to the search engine robot will not follow it and so parts of your site will not be indexed. If you use site navigation scripts then you must provide copies of the regular HTML to make them visible to everyone - your human visitors and search robots.
Session Identifier
Some countries use the session identifier. This means that every visitor gets a unique parameter (& session_id =) when he or she arrives at the site. This ID is added to the address of every site visited in the country. Session ID help site owners to collect useful statistics, including information about the behavior of visitors. However, from the point of view of a robot, a site with a new address is a brand new. This means that, every search robot comes to such a place, he will get a new session identifier and will consider the pages as new ones whenever it visits them.
Search engines have algorithms for consolidating mirrors and pages with the same content. Sites with session IDs should, therefore, be recognized and indexed correctly. However, it is difficult to index such sites and sometimes they can be indexed incorrectly, which has a negative effect on SEO rankings page. If you are interested in SEO for your website, I recommend you avoid session identifiers if possible.
follow
Redirects make site analysis more difficult for search robots, with resulting negative effects on SEO. Do not use redirects unless there is a clear reason to do so.
Hidden text, a deceptive method SEO
The last two issues are not really mistakes but deliberate attempt to deceive search engines using illegal SEO methods. Hidden text (when text color matches the background color, for example) allows site owners to fill a page with their desired keywords without affecting page logic or visual layout. Such text is invisible to human visitors but will be seen by search robots. The use of such deceptive optimization methods may result in banning of the site. This can be excluded from the index (database) search engine.
One-pixel links, SEO trick
This is another deceptive SEO technique. Search engines consider the use of small, almost invisible, graphic image links just one pixel wide and high as an attempt at deception, which may lead to a site ban.
External factors ranking
Why inbound links to sites are taken into account
As you can see from the previous section, many factors that affect the ranking process are under the control of webmasters. If these were the only factors, then it will be impossible for search engines to distinguish between a genuine high quality document and a page created specifically to achieve high ranking, but contains no information search useful. For this reason, an analysis of inbound links to the site being evaluated, is one of the main factors in page rankings. This is the only factor that is not controlled by the site owner.
It makes sense to assume that interesting sites will have inbound links. This is because the owners of other sites on the Internet will tend to have published links to a website if they feel it is a valuable resource. Search engine will use this inbound link criterion in its assessment of the significance of the document.
Therefore, two main factors affect how many pages are stored by search engine and sorted for display in search results:
- Relevance, as described in the previous section on internal ranking factors.
- The number and quality of inbound links, also known as Link Popularity Link citation or citation index. This will be described in the next section.
Link importance (citation index, link popularity)
You can easily see that by simply counting the number of inbound links does not give us enough information to assess a country. It is clear that a link from www.microsoft.com means much more than a link from some site www.hostingcompany.com/ myhomepage.html ~. You should take into consideration the importance of the link and the number of connections.
Search engines use the notion of citation index to assess the number and quality of inbound links to a site. Citation Index is a numerical rating of the popularity of a resource expressed as an absolute value that represents the importance of the page. Each search engine uses its own algorithms to evaluate a citation index page. As a rule, these values are not published.
As well as the value of absolute citation index, a scaled citation index is sometimes used. This value shows the relative popularity of a site in relation to the popularity of other sites on the Internet. You will find a detailed description of citation indexes and algorithms used for their evaluation in the next sections.
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