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The reason why people do not validate the HTML is that whenever they test, the page will seem to display without any problem. Why that is the web browsers, will be able to display the HTML, which is technically incorrect? Does this mean that we need not worry about the HTML or the invalid HTML (or PHP or JavaScript or CSS)?

For this the answer is:

When the web browsers were invented, most of the programmers recognized that there was much possibility that there would be thousands of people writing the HTML and creating the web pages as well. When so many people are trying to use the markup language or programming language like that of HTML, then it could be more frustrating quickly if each tiny results are shown in the page. So then, the programmers of the web browser decided that the browsers should be more forgiving.

All these means is that if the web browser views the WebPages, then it has the rule of HTML and it attempts to interrupt them in order to display your own WebPages. However, when it comes across something or the other, which is unexpected, from the older specification or incorrect, then the browser will ignore and tries to guess what the designer will want.

This will mean that a lazy or a novice designer will be able to get away with the incorrect code and have the pages that will display in browser window eve without a single problem. Some of the errors that occur are minor and the errors will be like that of leaving off alt attribute in the image tag. This is invalid technically but in anyway the browser will display the image. Some of the errors that occur are bigger kike that of leaving the closing the table tag off. In the old version of the Netscape, this problem could cause a table and each and everything would be after it in the HTML in order to simply disappear. IE did not mind the missing of the table tag and it would also display the page. Most of the designers who all did this would not test in the Netscape and would not know what the problem is for about long periods.

Why do you want to bother with the valid HTML?
While almost all the browsers will try to attempt the HTML even if the errors are there, so there are few good reasons in order to validate the HTML.

The HTML might display and it might display entirely different than if it was written correctly.
The errors that occur will compound each other.
Most of the browsers are really forgiving.
The invalid HTML especially if it is been deprecated then it might be supported by the browsers

Therefore, it will be good if you test your WebPages in the Web browser but by validating the HTML and CSS will surely help you to make that stand the test of new browsers and time as well.

Most of the newcomers and webmasters to the Webpage design will overlook at the crucial feature of promoting the Website and for this one of the thing that you need to have is valid HTML code.

So what do you mean by valid HTML?
Most of the WebPages that are there are written in HTML. As most of the languages have their own grammar, syntax and vocabulary, even HTML has got its own grammar, syntax and vocabulary as well. Each and every document that is written in HTML should follow all the steps.

HTML keeps on changing constantly like any other language. As HTML has turned out to be one of the relatively complex languages and it is easy to make some mistakes while writing codes.

The HTML code that doesn’t follow the rules of HTML is called as invalid HTML code. You should know why is the HTML code that is valid is pretty important for Search Engine Optimization and also for your marketing attempt.

Search Engines that are available today have to pass all the HTML codes that are written in your websites in order to find the content that is relevant. If at all your HTML codes contain some errors, the Search Engines will not be able to find out the content on your pages and at that moment your SEO attempts and the quest for High Rankings on the Search Engines will end there.

HTML standards are obeyed by Search Engine Crawlers. Search Engines can index your Website when and only if the code is compliant to the HTML standards. If at all there is an error in the webpage, then the Search Engines will stop crawling your Website. If your page is missing a single bracket, then also your webpage would not be found on the search Engines. If at all your webpage is missing with few important tags, then the Search Engines may ignore the entire content of your WebPages.

So how will you check the validity of the HTML code? Fortunately, for everyone’s luck there is HTML validator that will validate your HTML code for validation.
The HTML validator that is released by the Search Engine Optimization community and it is called as “W3C HTML Validator”.
This is the service that is available that helps you to check out the HTML documents for the purpose of “conformance to W3C HTML”, “HTML Standards” and for “XHTML Recommendations”.

To make sure that the errors are corrected that are outlined by W3C validator, just enter the address of the Webpage that has error at “Netmechanic invalid HTML repair page”. Here you will have the options to fix the errors.

Though, not all the errors of HTML will cause problems for your webpage in the Search Engine Rankings. Some of the errors can keep the web spiders from indexing all of your WebPages and helps you to not to spoil your efforts of “Search Engine Optimization”. If your HTML code is valid, then it makes it easier for the Search Engines Spiders to index your Website and you have to ensure that there is no biggest mistake in your WebPages.