https://wccftech.com/world-of-warcraft-shadowlands-beta-live/

The World of Warcraft Shadowlands Beta is now live and those who have been selected can try out the game’s test content.

The beta for the upcoming World of Warcraft expansion is available to those who have been invited for the beta after having opted-in for testing. According to Blizzard, invitations are going out regularly throughout the beta, so be sure to opt-in for it.