Group owners and admins manage everything from the group's Manage area on the website — open your dashboard and press Manage on the group.
On the Settings tab, pick a Discord channel for each notification type — drops, levels, personal bests, combat achievements, pets, quests, collection log slots, deaths, and achievement diaries. Leave a channel unset to disable that notification type. The channel picker lists your server's channels directly, so there's no copying IDs around.
Choose which bosses appear, how many personal bests are displayed, and where PB embeds are posted. Groups with the Hall of Fame (Supporter plan and up) configure their boss list here too.
Pick the board style, the channel it's posted to, and whether the bot reposts the image or edits the existing message. See lootboards.
Most notification keys have a seasonal mirror, so you can run a parallel configuration for Leagues / seasonal worlds without touching your main setup.