It's okay.. No way "AFK" though
Like any other "AFK" game you need to be there 24/7 monitoring if you want to play the game. There's dungeons you need to start manually, your character stops doing them if you close the game at any point. There's quests you manually have to click on to complete. Something as simple as "kill 10 enemies" which take seconds to do. So you're stuck with a so called "AFK" game that requires you to have the app open constantly, actively accept quest rewards, actively start dungeons, actively upgrade gear, actively upgrade gear, actively open chests to get new gear. The only "AFK" think about this game is that your character farms for you for a maximum of 2 hours. If you don't claim loot after 2 hours, anything farmed will be lost.