Blogging on your website is extremely important.
Google evaluates and ranks websites on many factors, and because they keep those factors secret, there is alway some discussion about which factors are most important.
However one thing is certain.
New and fresh content is important for your site's ranking!
The easiest way to do this is blog.
Your blog posts do not have to be long and they do not have to be profound. They do have to be done.
Based on how often a website normally gets fresh content is how often google will come visit your site to check it out. If you put up new content once a month, then google will come prowling only occasionally. If you are putting it up every day, google will prowl much more frequently.
But of course there are few people who are able to blog on a daily basis. So balancing practicality we recommend that you create a new blog post on your website at least once every two weeks. This will keep a steady flow of new content, and is also not an unrealistic on hard to manage goal. Do it more if you can. But there is no point in doing it lots one month then not at all the next. The target is steady, consistent new content flowing into your site.
Have a Profitable Week!