Vortex is a mod management tool created by one of the biggest modding sites, Nexus Mods, which helps make modding easier. It helps you get your load order sorted and files managed correctly, so ...

Or, you can install Baldur’s Gate 3 mod manager. Select ‘Manage’ on the Baldur’s Gate 3 file in the Games section of Vortex.

It's useful for installing a couple of must-haves, but it doesn't hold a candle to more full-fledged software like Mod Organizer 2 or the Vortex Mod Manager.