Many times i have been asked if you need to optimize for just one keyword phrase per page. Surprisingly, many SEO experts believe that you should optimize each page of your site for just one keyword phrase. Their explanation for this is that you will keep a strong focus on that one keyword phrase, but the problem with this is, first, it's very difficult if not impossible to write a page in a natural manner while you're trying to focus on just one keyword phrase. And second, it's a waste of a good page!
Why optimize for just one keyword phrase when you can optimize it for 3 or even 5 keyword phrases? The more keyword phrases you optimize a page for, the more targeted search engine traffic you will receive. If you look at your web analytics right now, you'll typically see that each page of your site is already bringing in traffic from various forms of numerous keyword phrases. It's not only okay to optimize for more than one phrase, but in my opinion it's critical to your website and to search engine success.