Document compatibility defines how a browser renders your website.  The more specific you are at telling the browser what to expect, the better the experience for your users. When using web standards like HTML5, start by explicitly declaring the HTML5 document type:

[code lang="html"]&lt;!DOCTYPE html&gt;[/code]

This markup triggers standards mode in Internet Explorer 9 and 10.  And it also works well in Chrome and Firefox.  Four steps will get your site ready for many browsers and devices:

<h2>Step 1: Validate that your site uses standards mode</h2>
Check whether or not your site is currently in standards mode:
