The Easiest Unnatural Method
No matter how much they try to prevent backlink acquisition, it is the easiest unnatural method to increase pagerank value. Along with the purchase of promotional articles and text links, comment backlinks have now emerged. You can get a quality backlink through a comment you leave on a site. You can support your SEO work by getting backlinks through quality articles you write for the sites you follow. For example, by supporting a charity, you can arrange for them to publish your link, or by creating a small application for phone app stores, you can get quality backlinks by providing a link in the description section.Pay Attention to Whether It's Nofollow
Besides these, forum promotions that will increase your SEO score, signatures in forums, promotional articles you can request from friends who own quality sites, answering questions on Yahoo Answer forums, writing comments on university blogs, or organizing competitions to get links to you. However, in all these comments, the comment must be written carefully and meaningfully. In addition, pay attention to whether the comments you write on non-corporate sites are nofollow. Otherwise, it will be of no use other than providing visitors to your site.
You can support your SEO work and get backlinks by writing comments during your time spent on the internet. 
