A region is a place. Some regions have different servers. There are 6 different regions. Some only have 3 servers and some 23. You can select a region in settings.
List of Regions:
- USA-East - has 12 servers
- USA-West - has 6 servers
- Brazil/ USA-South - has 6 servers
- Europe - has 23 servers
- Asia/Australia - has 3 servers