a lot of people suggested me to open an account on web 2.0 websites and get backlinks. so I did. I opened an account on sites such as blogger and medium and got profile and article links. but I couldn't understand how these links worked for me. They don't even show up in the ahrefs report. Can anyone enlighten me on this?
They are simply web properties. Like when you buy a domain and host a site for it. To rank you need other properties to link to you. The thing is that if the property is worth 0 either a brand new domain, or a web 2.0 property, then it will not pass any authority to you
In the past (150 years ago approximately), web 2.0 were subdomains of overpowerful domains. And for some strange reason, for many years, Google did not notice that they were giving part of the power of the main domain, where such web 2.0 main domain was hosted.
But then Little Googy grew up and said: WTF I'm doing with my life? Why I'm considering that all those shitty 2.0 properties have any power at all, since they are only holding on their main domain value? and they re-coded their algorithm to send literally 0 power from them. Instead of holding the main domain authority, they started holding just their own authority.
At the same time, on the middle ages of the SEO history, there were some daimons that wanted to bring doom to the good souls, and started blasting with shitty links the nice pages to bring them down from ranks so Google "tagged" them as spammy and they started dropping. Daimons were happy and dancing for many years. But for some strange reason, those web 2.0 properties did not drop, and someone in BHW thought: why those super-high authority pages don't drop under these circumstances? And this is when a new era of SEO-tiering started, using these properties as "authority-proxies" for the main sites.
Nowadays, Google has grown up a lot, and new algorithms take place, but still those 2.0 properties are very resilient to blasts, so you may find some utility in them if you think a little about it. If you would rather not think much,
simply read this.