Ranked rounds are earned when you complete a 9 or 18 hole Scored game from the Main Menu. Also, any Club tournament or WGT tournament matches are ranked games.
Par-3 and Par-5 courses will not count as a ranked round not even in in tournament play. Nor any Practice rounds, Skins, CTTH, Blitz, Match play or Alternate Shot matches. So all the "fun" matches are not ranked rounds. If you want to tier up, you must play Score, or Score Tournament Matches. Thas is why you will find players wo have played WGT for years, andare still Pros, Tour Pros, and Masters. They play fun games with close friends and dont care about what tier they are in.
To Tier up you need the following:
Pro to Tour Pro: 20 ranked rounds/ 72 avg or less
Tour Pro to Master: 30 ranked rounds/ 67 avg or less
Master to Tour Master: 40 ranked rounds/ 63 avg or less
Tour Master to Legend: 50 ranked rounds/ 61 avg or less
Legend to Tour Legend: 500 ranked rounds/ 60 avg or less
The ranked rounds are the minimum needed in each tier to become saturated. The quanity of ranked rounds, in theory, resets each time you tier up.