Very common. Advertisers already know everyone you come in contact with, or ar least those whom you spend time with. They will use that info to push ads to the group, or to the relevant people of that group.
It's Christmas time, you browse moccasins store for 10min, obviously you're interested in them. Why wouldn't advertisers show that item to your gf? That's like the perfect ad for her.
Valheim.
Great and fun combat, mod support, multiplayer, good building mechanics, doesn't feel frustrating to play.