I was in a meeting with a friend of mine, Jill Harding, last week when she told me a great analogy for keeping a website's content up to date. She asked me the question, 'How many times can you watch the same Seinfeld episode before you just change the channel?' I know that Seinfeld is one of the all-time great shows, but with no new episodes coming out, you know what to expect out of each show.

You had a great run guys, but I'm ready for something new
The same goes for stale content on a web page. Users, and potential clients, will only come back so many times to view the same content before they realize that what they are looking for isn't there. They will find their information somewhere else, leaving your website to become more and more outdated and obsolete, and you are left with your same old customer base.
Search engines operate in the same fashion. If they crawl your website every month and realize that nothing has changed, they are less likely to come back and index your website for search. Updating content on a regular basis can remedy this situation and invite the search engine spiders to re-index your site more frequently. Increasing how frequently you update the content can greatly improve your overall web presence and help your website become a source for information for your customers.