Validating your website Xxx aunty chat
Validating your web page does not ensure that it will appear the way you want it to.
It merely ensures that your code is without HTML or CSS errors.
If you are wondering what the difference is, an analogy from normal human language will hopefully make it clear.
Let's take this sentence "Chris a sandwich ate" which is grammatically incorrect when used in a non-poetic context.
Using standards-compliant HTML increases the likelihood that all web browsers and assistive technologies will correctly handle your content.
If you have designed your site using a visual web editor, and are not familiar with HTML and CSS, you will face an additional problem.That is, it will check that it complies with the CSS standards set by the W3 Consortium.There are a few which will also tell you which CSS features are supported by which browsers (since not all browsers are equal in their CSS implementation).Syntactically, the sentence is correct, since all the elements of the sentence, subject ("Chris"), verb ("ate") and object ("a pie") are in the right order.
Semantically, however, the sentence describes a different thing from what you meant.
Even pages that seem to look fine in a web browser might have unseen problems for assistive technology users.