The value of a great title for SEO purposes is invaluable. The title is the first thing a search engine sees to determine (what is this page about) and how does it relate to the sites theme and the keywords contained within the page.
A diffused title does not provide clarity for the reader or a search engine spider, so as far as first impressions are concerned, this is crucial to set the stage for short-term and long-term rankings.
The title should be short, informative. focused and concise. Each time you add another key phrase or keyword you can either diffuse or reinforce the title. However, if you add too many words, search engines will only get confused about the true topic of the page.