Blog Commenting for SEO: Effectiveness, Risks, and Best Practices
Blog commenting used to be the easiest way to build backlinks. I know because I did it. A lot of it. When I started blogging in 2008 at age 15, leaving comments on other blogs was how you got noticed, built links, and grew your traffic. Fast forward 18 years, and the landscape looks completely different. Most of those comment links are worthless for rankings now. But that doesn’t mean blog commenting is dead. Visit for more information Better with age
Here’s what I’ll cover: what blog commenting actually does for SEO today, why the old approach is dead, and how smart marketers still use comments to grow their sites without chasing link juice that doesn’t exist anymore.
What Is Blog Commenting for SEO?
Blog commenting for SEO is the practice of leaving comments on other people’s blog posts with the goal of generating backlinks, driving traffic, or building visibility. The basic idea is simple. You find a relevant blog, leave a thoughtful comment, include your website URL in the comment form, and hope that link sends some value back to your site.
Back in the early 2000s, this actually worked for rankings. Blog comment links were treated like any other backlink by Google. If you left a comment on a high-authority blog with a link back to your site, that link passed PageRank. It was free, it was easy, and it scaled. So naturally, everyone abused it.
The typical blog comment form has fields for your name, email, website URL, and the comment itself. When you submit a comment, most blogging platforms like WordPress create a hyperlink from your name to the URL you provided. That hyperlink is your “backlink.” In the golden age of SEO, these links carried real weight. Today, the vast majority of them carry almost none.
I remember spending entire evenings in 2009 and 2010 just going through blogs in my niche, leaving comments on every post I could find. It wasn’t sophisticated. But it worked back then because Google hadn’t figured out how to discount these links yet. The web was smaller, blog communities were tighter, and comment sections were genuine gathering places for discussion.
The Rise and Fall of Blog Comment Spam
To understand where blog commenting stands today, you need to understand what killed it. The short version: spammers ruined everything. The long version is more interesting.
The Golden Age (2000-2005)
Blog commenting in the early 2000s was authentic. People read posts, left real thoughts, and engaged in conversations. Comment sections on blogs like ProBlogger, Copyblogger, and John Chow were mini-communities. You’d see the same names showing up, building reputations, and forming connections. I was too young to participate in this era, but I read through those archives when I started blogging in 2008. The quality of discussion was remarkable compared to what came later.
During this period, Google treated comment links like editorial links. A comment on a PR6 blog (remember PageRank toolbar scores?) passed real juice. SEO practitioners caught on quickly, and automated comment spam tools started flooding every blog on the internet.
Google Fights Back (2005-2012)
In January 2005, Google, Yahoo, and Microsoft jointly introduced the
rel="nofollow"
attribute. This was a direct response to comment spam. The idea was simple: add nofollow to comment links so they don’t pass PageRank, removing the SEO incentive for spam. WordPress, Blogger, and most other platforms quickly adopted nofollow as the default for all comment links.
Did it stop spam? Not even close. Spammers kept going because many didn’t know about nofollow, and some blogs hadn’t updated. Automated tools like ScrapeBox and Xrumer made it possible to blast thousands of comments across the web in minutes. I saw this firsthand on my own blog. By 2010, I was getting 50-100 spam comments per day on posts that had any search traffic. Akismet caught most of them, but the volume was insane.
Then came Google Penguin in April 2012. This algorithm update specifically targeted manipulative link building practices, including large-scale blog comment link schemes. Sites that had built their backlink profiles primarily through blog comments, forum links, and other low-quality tactics saw their rankings tank overnight. I watched several blogs in the Indian tech blogging community lose 60-80% of their traffic within weeks.
The Modern Era (2012-2026)
After Penguin, blog commenting for direct SEO benefit was essentially over. Google got increasingly sophisticated at identifying and discounting low-quality links. The introduction of
rel="ugc"
(user-generated content) in 2019 gave site owners another way to mark comment links, making it even clearer to Google that these weren’t editorial endorsements.
Today in 2026, here’s the reality. Almost every blog comment link is nofollow or ugc-tagged. Google’s systems can easily identify comment-based links. Building your SEO strategy around blog comments for link juice is like trying to win a marathon by crawling. You’ll technically be moving forward, but you won’t get anywhere useful.
Does Blog Commenting Still Work for SEO in 2026?
The honest answer is: it depends on what you mean by “work.” If you mean direct link juice that improves your rankings, then no. Blog commenting is basically useless for that. But if you expand your definition to include indirect SEO benefits, the picture changes significantly.
Direct SEO Value: Almost Zero
Let me be blunt. The direct SEO value of blog comment links in 2026 is close to zero. Here’s why:
I tested this with a client’s site in 2024. We left 200 high-quality comments on relevant blogs over three months. Zero measurable ranking improvement for any target keyword. The links showed up in Google Search Console, but they moved nothing. Compare that to 5 quality guest posts during the same period that pushed 3 keywords onto page one.
Indirect SEO Benefits: Actually Valuable
Here’s where it gets interesting. Blog commenting can still help your SEO, just not through the links themselves. The indirect benefits are real, and I’ve experienced them personally.