A couple of years ago one of the easiest ways to getting backlinks was with blog comments, a lot of people have based their entire SEO strategy on backlinks from blog comments. In that period google also used page rank to determine the quality of a website, and the best part about this was that everybody could check the page rank of any website. Google in the past couple of years has ditched the page rank although it is safe to say that they still use a similar but hidden metric.
Blog comments do not help SEO, most of them are considered spam, they have low link juice, way too easy to automate, they are no-follow links, some contain malware, backlinks are from irrelevant blogs, most of them are link farms, they pass on google penalties, some of the blogs are deindexed, and it is extremely difficult to index blog comment links.
If you know what you are doing than blog comments can still be effective, if you want to use them then my personal recommendation is to use only do follow blog comments on sites which have a TF above 70 Click here to check it out
The problem with page rank was that people have found out how to increase their PR artificially, making the entire system useless. Keep in mind that this was before the age of DA, PA, and TF and most webmasters relied on PR to determine the quality of a backlink. Once google stopped showing and using PR, some backlink report websites have made their own versions of it, like the DA, PA, TF, UR, and so on.
Old and established blogs had a lot of authority, it seems that the more comments they had the better they ranked, although 99% of the comments were pure spam. You could even get PR 9 blog comments if you could place a backlink on the homepage of a blog, which is extremely hard today but a couple of years ago it was extremely easy. The decline of blog comments for SEO has started once people automated it with specialized software like Scrapebox.
These Softwares could build thousands of blog comment backlinks in a matter of hours, and besides the software, all you needed was a couple of proxies. So naturally, everybody started blasting their websites with blog comment backlinks, and eventually, google took action and lowered their effectiveness, today they are mostly useless for SEO although there are still a lot of people using them. If you have a brand new website and you are wondering when to start building links than check out my recent article When to start building links? ( Top 6 Criteria ).
One of the main reasons why blog comments do not help SEO is because most of them are spam made with automated software. If you have a blog and you allow people commenting on your post then you probably know that out of thousands of comments only 1 or 2 are actually made by people, the rest is irrelevant and spam. Authority blogs that were used for blog comment backlinks are long gone, google has penalized most of them.
Some bloggers still leave their blog comments open, so anybody can comment, thinking that this will add value to their content and will artificially inflate the word count of the actual article. Google knows that most blog comments are spam, especially the ones which do include a link, so they will rarely take them into consideration when deciding where your website should rank. As blog comment backlinks are so easy to make you could end up building too many backlinks, for more information check out my recent article Can you have too many Backlinks? ( Top 10 Negative Effects ).
Low link juice
If you have been in the SEO world than you have probably heard of link juice a couple of times. Link juice is basically the power of backlink which is determined by the power of the website which links back, how trustworthy the site is, relevancy, and the number of outbound links ( OBL ). Simply put the more comments with backlinks a post has the less link juice will each of them get, this happens because google splits the link juice between every single backlink.
Google implemented this technique in order to directly combat blog comment spam, although it didn’t really have the effect which they hoped for. Instead of lowering spam, they have actually increased it as people built even more blog comment backlinks to bypass this soft penalty. High PR blogs have been blasted with a lot of blog comment backlinks, some of them have thousands of comments with backlinks, and all of them are spam. If you want more info about how OBL affects link juice then check out my recent article What are low OBL links? ( Where to get them? ).
Easy to automate
One of the main reasons why blog comment backlinks do not work for SEO is because they are extremely easy to do, and basically, everybody is and was doing them. Keep in mind that a couple of years ago when blog commenting was viable for ranking there was no ReCaptcha. Basically, you could blast any blog with as many blog comment backlinks as you want some of them had some basic captcha but these very extremely easily bypassed by bots.
Generally speaking when you are thinking of your backlinking strategy you should always think of how it can be automated. If you can automate the backlinks with software than odds are that a lot of people are using the same software and they will have more or less the same link profile as your website. Your goal is to try and get a couple of backlinks from websites from where it is extremely hard to get a backlink.
No follow links
Most blog comment backlinks are no-follow this means that they will not help you rank your website directly. Although a healthy link profile should always have some no-follow backlinks as it looks more natural. If you rely only on blog comments to rank your website then you will notice that it will take a while to see any positive movement in the SERP’s although if you only have blog comments this positive movement will most likely never happen.
Blogs that allow comments with links in them are often spammed to death with a lot of dodgy links, this includes anything from scammy CPA offers to malware and viruses. Just think about that for a second and ask yourself why would you want a backlink from a post which has thousands of blog comment spam and some contain viruses, malware, and similar backlinks. If you want your link profile to look as clean as possible then you should probably stay away from blog comment backlinks.
Although you might think that if you do not click these links you should be safe, but there is a new strategy in town targeting directly those who are building blog comments with software. You might find that your VPS has been compromised, and even worse you got ransomware on your PC, just because the blog commenting software accessed a dodgy website and while it was trying to build the backlink it has “clicked” on some dodgy link.
Most blogs that allow blog comments tend to be general blogs or recipe blogs, you will have an extremely hard time finding niche relevant blogs which allow blog comments. Relevancy is extremely important for ranking in google, in fact, one of their updates was directly targeting relevancy. Back in the day, it used to be a viable strategy to grab an expired domain from a political candidate who was running for office and repurpose the domain for basically anything you wanted.
These expired domains had a lot of backlinks from high authority websites, and these were so powerful that anything that got published on the website ranked in a matter of weeks. This is why you often see something similar in the SERPs like “vote for random name” ranking in topics like gardening, health, finance, and so on. This strategy no longer works, and if you can’t get niche relevant blog comments than you are just wasting your time.
A lot of blogs that allow blog comments without any moderation and ones that have thousands of blog comments tend to be considered link farms by Google. Link farms are blogs and websites which are spammed to death with blog comments. Sometimes google deindexes these blogs in order to combat spam, although people who use software for blog comments won’t even notice that they are building backlinks from a deindexed blog.
Google knows which blogs are the most commonly used for blog comment backlinks, and they will often penalize these blogs, which in theory should make the administrator of the blog take action and delete the blog comments. The problem is that there are way too many abandoned blogs which have no moderation at all and not even a captcha, generally speaking, these are the most spammed ones with blog comments.
The problem is that these penalties pass from one backlink to another, this is why it is extremely important to have high-quality backlinks. If the blog where you are making the comments has a penalty for spam or something similar than odds are that this penalty will pass on to your site, as you are one of the spammers. This is not like the link juice where the penalty is split up between the backlinks.
Just take a look at any blog which has hundreds of blog comments with links and see how many of the linked websites are indexed, odds are that a lot of them got deindexed if they have built a lot of comment backlinks.
One of the worst things which you can do for SEO is to get backlinks from deindexed blogs. Deindexed blogs and websites have no trust in google’s eyes and most of them are deindexed due to a penalty from Google, the last thing you would want is to have a backlink from a deindexed blog. If you are buying blog comment backlinks than you should check if the blogs are actually indexed, more often than not they are not indexed.
This can also happen if you use a software, so before letting the software build any kind of blog comment backlinks than check if the blogs are actually indexed, if they are not then put them in your blacklist and avoid them.
Hard to index
Blog comment backlinks are notoriously hard to index, although most people think that if the blog post is indexed than their blog comment backlink is valid and also indexed. The truth is that Google has to crawl the blog comments first. A lot of websites that have hundreds of blog comments do not get crawled that often, Google knows that most of the comments are spam so they do not even bother crawling them.
If you have built hundreds of backlinks from blog comments then you will notice that the vast majority of them are not indexed. If you are lucky, then google might index them after some time, but odds are that they will never index them and will leave you wondering why you are not ranking with your spammy looking blog comments.
As you can see blog comment links aren’t very useful, although some people still use them but only a fraction of them actually rank with the help of blog comment links. The main problem with blog comment links is that they are way too easy to make with software, and basically everybody can make thousands of backlinks in a couple of days.