Blog commenting for SEO involves leaving comments on relevant blog posts with a link back to your own website. These comments can include a short description or message that contributes to the discussion or adds value to the topic of the blog post. The primary purpose of blog comment backlinks is to generate referral traffic and potentially improve your website's search engine ranking. However, it's important to note that blog commenting as an SEO strategy has evolved over time. In the past, some marketers used blog comments solely for the purpose of obtaining backlinks, often without providing meaningful contributions to the discussion. This led to spammy and low-quality comments, which search engines began to recognize and devalue.