It will be what appears in people's bookmarks to identify you too. Many search engines and directories consider this line of text, be sure it makes sense and it includes a major keyword, or two. Pages with keywords appearing in the title are assumed to be more relevant than others to the topic. Search engines will also check to see if the keywords appear near the top of a web page, such as in the headline or in the first few paragraphs of text. They assume that any page relevant to the topic will mention those words right from the beginning.
Frequency is the other major factor in how search engine determine relevancy.
A search engine will analyze how often keywords appear in relation to other words in a web page. Those with a higher frequency are often deemed more relevant that other web pages. Essentially these tags tell the search engine two things about your site. The overall description of you web site 2. This information is important when it comes to deciding where to categorize your web site.