The title tag is required in all HTML and XHTML documents and specifically is used in the following 3 ways; 1. Defines the title in your web browser 2. Displays the title in certain search engine results 3. Displays the title when you add a favorite These simple words are one of the most important factors in any good SEO planning. Even merely fixing the title tags on your web page could generate a comparable difference in your search engine rankings. When creating title tags you want to keep in mind the “main ideas” throughout the content of your website.