Title Tag is an important Tag amongst other SEO related options , as it not only communicates the theme of your web page to the human visitors but is also considered very important by the Search Engine crawlers. Title Tag is not a Meta Tag, but nevertheless it is the most important of all Tags. Almost all crawler based search engines use the Title Tag to gather information about your web site. The search engines use the words or the content of the Title Tag during the ranking process to analyze the relevance of your web page. Major search engines   use your web page's Title Tag to evaluate its relevance.