Which are the most used HTML tags in web design? I received this curious question form a friend of mine some days ago and I tried to find an answer analyzing the HTML structure of a selection of 50 popular web sites that includes CNN, Time, New York Times, ABC, Apple, Reuters, Yahoo, Technorati, AOL, Amazon and here is the result.
1. The most used tag is the <a> tag and this is natural enough considering web sites are full of hyperlinks to internal and external pages. Often the <a> tag is used with the <li> tag to list links in specific page sections or implement navigation bars.
2. The second most frequent tag is the <div> tag that is used mainly to describe the elements that compose the structure of web pages (header, navigation bar, sidebar, footer) and more in general to represent block-level sections cannot be described by other HTML tags.
3. The third place is for the <p> tag.
4. For their versatility <li> and <ul> tags are used in many different situation for example, as I said before, to describe sections of links and navigation bars.
5. The <span> tag is often used to highlight particular inline text contents.
6. <h1><h6> are used for headings. <h1>, <h2>, and <h3> are more frequent than <h4>, <h5>, and <h6> tags. In some cases headings are also described by <div> instead of <h1><h6> tags.
7. Last place is for the <script> (yes, these pages are really full of scripts!).

Naturally these results are limited to a small sample of web sites but I think can be quite indicative for a general trend. What do you think? Do you use these tags with the same frequency?