One of the many reasons why blogs are such a powerful SEO tool is because they encourage visitors to leave comments. Each time a visitor leaves a comment -- assuming it's a legitimate comment -- it creates fresh new content for the blog, which search engines love. However, there are a few things you should know about the do's and don'ts of moderating blog comments. Do: Moderate Comments for Approval Wouldn't it be great if every comment left on your blog was legitimate and came from an actual human visitor? Well, this isn't the case, as a large portion of comments are generated from autom...