What is layering in WoW?

Related questions

1. Is WoW classic beta out?
2. What is sharding in wow?
3. What time does WoW classic release?
4. Is WoW classic playable?
5. What were the original classes in WoW?
6. What is spell batching in WoW?
7. Are WoW Classic servers out?
8. What races can be what classes classic WoW?
9. What time does WoW classic beta start?
10. Do you have to buy every WoW expansion?

Tags

1. #create
2. #classic
3. #instead
4. #players
5. #balance
6. #realm
7. #around
8. #shards
9. #allows
10. #sharding
11. #instances
12. #balancing
13. #layering
14. #population
15. #multiple
16. #technology
17. #itself
18. #alternative
19. #several
20. #world
21. #realms
22. #warcraft