There are two benefits to blogging. Better search engine optimization and increased profits.
It's a fact that blogging will increase your search engine optimization if you blog on a regular basis and submit your blog post to article directories.
The reason blogs improve your S.E.O. is because every time you update your blog, search engines send out what's called "spiders" and they crawl your blog. And every time they find new content on it, they make a note of it. So over time if you continually update your blog your search engine ranking will also increase.
But if your just updating your blog and not doing anything else your search engine rank will improve slowly. To substantially increase your S.E.O. and increase your traffic. Do keyword research and pick good keywords to title your blog post. Doing this will help search engines recognize the content of your blog.
After you do this the next step is to submit your new keyword optimized blog post to article directories with a link back to your blog. Every time you submit an article to article directories you create a backlink to your website. And search engines view blogs and websites with backlinks as being important. So it's good to build up a lot of backlinks, the more you have, the more important you are to search engines.
An added benefit of submitting articles to article directories is that website and blog owners go to them to find content for their sites. And there not allowed to change the content that they get from article directories so if they decide to use your article as content for there site. You just got another backlink and potentially more traffic to your site.
This extra traffic and better search engine optimization is what will lead you to making more profits.
To get started blogging visit - http://wordpress.org/
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