What are “themes”?
A theme is defined by search engines as a common topic throughout the site. In an effort to provide their users with more relevant information, search engines developed sophisticated technology that “extracts” site’s themes. This technology allows results to be more focused on the topic searched for.
Hint: Think of themes as your most important keywords used consistently throughout the site.
Importance of “themes”
Themes technology is quite complex. It’s used by some of the major search engines when indexing and ranking sites. Currently, Altavista, Lycos and Google use themes as part of their formulas. Inktomi powered search engines, such as AOL, Hotbot, and MSN also use themes.
Avoid the use of spam
When trying to convince search engines of a theme on your site, avoid repeating keywords more than 3-7 times in the title or meta tags. In the text, 3-7% of all words should be keywords