Hi Newbie,
Here is the answer for your question.
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 like Google, Yahoo, AOL, AltaVista, and AlltheWeb use your web page’s Title Tag to evaluate its relevance.
Title Tag is the hyperlinked text title that is displayed in the search engine results page (SERP). The users, in turn, click on this hyperlink to go to your web site.
The Title Tag is also used as the text when you ‘bookmark’ a page or add a certain web page to your ‘favorites’ list in your browser.
A carefully constructed Title Tag is very important for your page’s ranking with the search engines.
Of late, a large number of articles have been written with differing views and opinions regarding the relevance and benefits of various Meta Tags. Most experts, however, agree that the Title Tag is a significant tool in any search engine optimization campaign.
Very good and comprehensive explanation!