For teams that want to use technology to the maximum, recording MS Teams meetings allows them to use copilot transcript etc. That is the most common reason I see these days.

Earlier the main reason was to allow for a human to revisit any important discussion of they missed making detailed notes. It also allowed anyone who misses the meeting to catchup. And for global teams, team members in other time zones can catchup and maybe rewatch the meeting of accent differences made following the live meeting difficult. The coworker tasked with writing the minutes (manually!) would find it super handy. We also did recordings for "requirements gathering", "design review", "prototype walkthrough", etc so we captured all feedback and nuances thoroughly so next iteration can address them all.

For all these benefits we sometimes opened a MS Teams bridge and turned on recording EVEN WHEN we were all meeting in person. I would switch on the webcam and turn it towards the whiteboard, and try to get the best clarity possible -- a service to anyone who might be watching afterwards.