WoW Classic is still popular because Blizzard has done a lot of very, very right things. Game developers listen to feedback from players. Every expansion I've ever played has managed to solve the big and small problems encountered by most players.
Auction House is the best option for you to make a lot of coins. You must always pay attention to the Auction House because you will find the best deals there, which will help you make a lot of coins.
The War of the War is a very popular League. In addition to the large amount of positive feedback from the exiles, the content of the game itself is very high.
The Crafting Bench lets players craft a modifier into equipment or modify sockets and links at the cost of some currency. It can be found in the player's hideout.