Several site owners and webmasters spend several hours every day searching for blog sites that allow visitors to post comments. Surely, this is a time-consuming exercise, and even more time-consuming is the process of commenting on those blogs. Many people who don’t have any budget mapped out for search engine optimization (SEO) generally and link building in particular, but need backlinks pointing to their sites tend to choose this route. Granted, the main question many ask is if blog comment links are actually worth the effort, and if major search engines like Google, Bing, Ask and Blekko give any value to them.
There’s no stereotypical answer to the questions that can be plausible, without looking at the circumstances surrounding each blog site, blog post and the nature of the comments on the blog post.
Quality of the blog site: The most important thing web crawlers look at is the quality of the blog site – Is the content unique and how authoritative is it? What’s the quality of backlinks the blog itself has? How well are the comments moderated? An auto-approval or poorly-moderated blog will most likely contain a lot of spam comments and links. Search engines evaluate these factors, in order to determine the authority of the site.
Is the blog post unique or poorly rehashed or full of grammatical errors? All major search engines love unique blog posts, the same way they like unique content on regular sites. And they all despise posts copied in full or in part from other websites. Google’s new search algorithm in particular targets content farms, and so, stay away from them. Also, if the blog you want to comment on has numerous grammatical errors, it’s a sign that it doesn’t have any quality in the “eyes” of search engine algorithms.
The value of blog comments: Another thing to consider is if the comments found on the blog posts are on topic and add value to the readers. Do the comment links have the NoFollow tag attached to them? Many blog comment posters post their comments for the sole purpose of embedding their links, without giving much thought to the value. Some even go the extent of linking to questionable websites, and others use automated spam bots, thereby devaluing the quality of the blog site. Links that carry the NoFollow attribute are not followed by web crawlers, and so, they don’t have any link juice. However, commenting on a blog post that has few outbound links still carry some weight in search algorithms.
When you post a comment on any blog, make sure the post is relevant to the web page you want to link to, and that you write something very useful to readers. While majority of blog comment links don’t have much value, a few still do. Look for blogs that allow comments to be posted for a limited period of time before they disable further commenting.