Crowd Groups

Hello, how are you? I hope very well, it has been a long time since I published anything new here, you see, I am about to create my own website and speaking with an SEO professional he told me that one of the best ways to grow a website is through backlinks by hiring one or more crowd groups, is this true? Because I had never heard anything related to this, do backlinks placed by crowd groups really work? I would like to read your experiences placing backlinks to publish your website and also, where can I hire a professional to place this type of backlinks all over the internet? I want to know more about crowd groups and backlinks, so I will be reading