I know you should only use H1 once per page. Is this the same rule for the rest of the headings? Or can you use H2 more than once and so on? Thanks in advance.
There is acutally nothing in the HTML spec that says you can only have 1 <h1> actually. But it is considered good form to include ONLY 1 <h1> element per page because the <h1> should summarize what the entire document is about. And a page should really be focused on a single topic (so it should have a single <h1>). As far as <h2>, <h3>, ..., <h6> elements go, you can have as many of each of these as is needed to structure the content on your page. However, typically you might have a handful of <h2>s... occasionally use <h3>s... and almost never use <h4>, <h5> and <h6> elements. If you're using lots of <h4> - <h6> elements then your content should likely be broken up into multple pages.
Hello Friend, H1 tag we put the most important keywords and other are important but not in the comparatively to H1 tag and so on you can use this formula.
I guess search engines will have their own system of tags to judge the relevancy page for a keywords so a h1 tag will be same as <strong>, gone are the days of mediocre search engines where meta tags and heading played a major roles
I actually wrote about this in my X/HTML Best Practices posts here on the forums. http://forums.digitalpoint.com/showthread.php?p=8141503