Hello good gentlamen, care to assist?

Hi to all,just made my account after some time lurking, its a great forum full with knowlege. I want to ask, i started seo and i got to the link building part. I want to understand the Tier levels,from one to the last, what they exacly are and what kind of links are supposed to be build in each one.
Can someone point to some autority thread where they are explained? I tried searching but could not find one, only random questions here and there, nothing complete.
10x a lot BHW people, you great

Get a tool like moneyrobot or backlinkbeast or seolinkrobot these tools are built around the process next try to find a copy of dream niches pdf by becker and cass which teaches best methods for fast ranking

linksmanagement is also a good tool

If you are free pm me your skype so we can talk about it

There are many threads that are available and contains a lot of information from different people about Tier 1, 2 and 3.