Blogs have many favorable attributes:

1) Ever changing content.

Search engines love constantly updated and new content. Blogs, newsletters, ezines are food for search engines because they are constantly updated and provided with fresh content. TIP: It is good that you try to update your blog about 5 times a week, more the better.

2) Search Engine Placement.

Like I said earlier search engines love blogs, and it easy to get indexed with the engines when you own a blog. Some people even consider blogs the back door to these search engines. You can start a blog and place a link to your own website and that will help your own website get listed once search engines index your site and click on your link. Great if your starting a new website. A lot of websites traffic is generated through search engines, and search engines are used billions and billions times over from people all around the world.

3)Syndication.

You can syndicate you blog through RSS (this is a whole other topic). RSS stands for Really Simple Syndication among many webmasters. This is a very useful tool because it allows many visitors of your website to put your content on their own homepage or website and provides them with instant updates of your website.

4)Pinging.

This goes hand and hand with benefit three, because through syndication you can also ping your blog to major search engines and directories and this will allow your website to be crawled almost immediately. This helps to get your new pages indexed quickly. Ping-o-Matic is one great service.

5)Popularity.

Blogs are very popular. Having your own and promoting it within the world of bloggers will drive a lot of traffic to your website. Some popular blogs get as many as 1 million visitors per month! Can you imagine the amount of money these guys are making with CPM advertising or even CPC advertising on their websites.

Having a blog is necessary for any website owner. It provides bait for the search engines and can help attract repeat visitors. So don't wait, go ahead and get your feet wet. There are many blogging services out there (like Blogger and Wordpress just to name a few). Personally I like Wordpress because of its ability to be customized extensively and its professional look. Anyway, bottom line is, get a blog and start blogging, cheers!