SEO blog commenting is good for search engine optimization because it helps build links to your website. Backlinks are links pointing (link juice) back to your site. People who share a link to your blog post tell their friends about your content. If people share your content, search engines consider it valuable and rank your page higher.

If you have a lot of followers, you may get lucky and get some free traffic. However, you'll need to work hard to gain more followers if you have few followers. You can do this by sharing your content on social media sites.