Background
Choose by what you play
Group size first. The solo, duo and trio lists only carry servers that publish those team limits. Then pace: vanilla, 2x, 3x and the rest are built from what servers put in their names or settings. PvE and roleplay sit apart from the PvP lists, and beginner servers are ones with lower pressure to learn on.
Choose by where and when you play
Region changes with the clock. The EU, US and AU lists show who is busy at the hour you read them, not at a fixed peak. If you want to join straight after a server resets, check servers just wiped and the next force wipe.
Every list is a shortcut into the full server list, which you can filter by region, type, group limit and wipe schedule. Positions come from live player counts, refreshed every five minutes. If a placement were ever sold, it would be marked as sponsored and kept out of the ranking.