I have seen, and even now I come to hear, that some SEO Companies, not all appoint SEO specialists who actually not doing the real SEO. They assign them data entry kinds of works like building building with 500 BL counts or 100 BL counts in a day, and that is not the right way to do SEO because instead of creating backlinks, one should create great content that could build up natural backlinks.
It’s a type of Grey hat SEO but whenever you do a lot of backlinks Give keep these things in your mind don’t build backlinks from useless websites, I mean irrelevant websites and very low-quality website.