How Blog Comments Help You SEO Your Website – The search engines love content. The more the content, the merrier (although Ask and MSN limit the amount of data on a page that they will index). In other words, that 300-word blog post you wrote yesterday will get more search engine traction when it has 25 comments on it.
Blog commentators will use the same key phrases in their comments that you used in your blog post. That will mean more instances of the keyword on the page and therefore you are more likely to be found for that key phrase.
Blog commentators will also use related key phrases that you didn’t use in your blog post. That will result in your blog post being found for key phrases that you didn’t target.
Thirdly, some blog posts, like forum posts, appear as separate pages in the search engines. Note that I said “some”. In order for your blog posts to appear as separate pages they’ll have to be threaded and coded just so.