Titles determine whether or not your web copy will be read. Clear page titles make it easy for the visitor to see that they’ve come to the right place. Compelling titles grab the visitor and almost force them to read what comes next.
The most important message a home page must deliver (after explaining what the visitor can do, buy or get on your site) is The Reason for doing business with you instead of your competitors (this is called your Unique Value Proposition). Notice I didn’t say The Reasons for doing business with you.