Silver tier members gain map access and discord feeds, and the ability to see raids, wayspot information, and rocket invasions. For a limited time, Silver tier members are also able to see pokemon spawns and IVs.
Gold tier members gain access to all map features and feeds, including pokemon spawns and IVs.
The same as the Gold tier, but if you want to help support my map even more you can pick this option and get the special Platinum role.