A blog post (or comment) is an entry on a blog.

Using your targeted keyword phrase as the anchor text, we will engage a professional writer to write and post a professional blog piece. By having a professional SEO writer blog about your website, we are able to control the anchor text. This allows us to use your keywords in links back to your site. These links help build your search engine credibility and are very beneficial to your SEO campaign.

Keep in mind that the most important part of this blog post is that it is relevant and the right keywords are used in conjunction with links to your site.