How do you play two characters at once in world of warcraft?

Answer 1

The only way to play two characters at once is by using a technique called "multi-boxing", using two accounts. You can log in on two accounts and different characters, and then play them simultaneously.

This might require some additional software to make sure both characters respond to commands at once, but on this I have no specific info.

This technique is often used to quickly level up a character on a second account by having them boosted by a high-level main, or duo lower level raids. In addition, it is sometimes used in PvP combat.