With your account your progress is backed up and the same on all your devices.
With an account you can also create and publish your own builds in the build planner – currently for Diablo 3, Path of Exile 2, The Blood of Dawnwalker, The Witcher 3 Remastered, Last Epoch, Diablo Immortal, ArcheAge Chronicles, World of Warcraft: Forever and Enshrouded.
