In a Microsoft Teams meeting, you can interact with other attendees in various ways; by speaking (audio), waving (video) or chatting (text). But if it is a large meeting, and you have something important to say or a question to ask, you can raise your hand to get the presenter’s attention.
To raise your hand, press Control + Shift + K.
To lower your hand, press Control + Shift + K again.
If you use a screen reader, it will announce whether your hand is raised or lowered when you use this shortcut. Also, you can find out who has their hand raised by pressing Control + Shift + L.