The title tag is very important because when some one enter query in search engine and when your site display in search engines result pages your site meta title display there. Title tells about the page.

Title Tag is basically an HTML tag, which is used to give a title to a document/webpage, similar to that of a title of a chapter of a book. It helps the users and the Search Engines to gauge what the content of the web page is about. Title tags are used by the Search Engines to show preview snippets for a page.