In case people wanted something a bit more descriptive. BDO is basically an online massively multiplayer 3rd person over the shoulder Action RPG with a heavy emphasis on Combo oriented fast paced combat combined with extensive world building and PvP.
In other words, if someone's concept of an MMORPG is WoW or Everquest, there are almost Zero similarities between BDO and those games other than it happens in a large open world. It's actually closer to something like God of War than it is to WoW or EQ. Well, that's if GoW had world building, free exploration, farming, harvesting, crafting, fishing, boat building, house building, house decorating, multiplayer, extensive character customization, wild horse taming, etc. etc.
It's an amazing game with graphics that were at the time top tier with character creation that was head and shoulders above anything else on the market (single or multiplayer). The action combat is also far ahead of many single player 3rd person over the shoulder action games.
However, just be aware that the end game features a signature of Korean MMOs ... grinding and lots of it. But even with that, it can be an extremely enjoyable game and there are potentially hundreds of hours of gameplay to be had (depending on what you are into) even without getting into end game grinding.
Regards,
SB