Team building is what you do when the team works together fine, but doesn't actually know each other. Different problem, different toolkit.
Team-building activities are the longer, lower-tempo cousins of energizers. They're not five-minute warm-ups; they're 20-to-60 minute exercises that surface something about the people in the room. Done well, they leave the team with one new fact about each colleague that didn't fit in a Slack bio. Done badly, they're forced fun. The line between them is whether participation is genuinely opt-in — and whether the format respects what people are willing to share at work versus what they're not.
After a hire wave when half the team hasn't met the other half. Off-sites, kickoffs, the first call of a project where the people are new even if the company isn't. Skip them on a team in conflict — team building is a connection tool, not a repair tool, and running one over an unaddressed argument makes the argument worse. Skip them when the team isn't asking for it; mandatory bonding is the failure mode every commercial coverage page glosses over.
Your name in the centre, branches for the parts of life you choose to share. Connection, not disclosure.
Works for design teams and offsites. Skip it for engineering on a Tuesday.
'What's X really good at?' is the format. 'What's X's strength?' is a 360 review.