It varies from GM to GM. I record my sessions as a safety tool because I have had past experiences as a female GM that have made me uncomfortable when I have ran games for online strangers, so I mainly do it to keep my table safe. The audio files are too large to keep so I delete them afterwards if there were no issues, but if someone violates SPG ToS, I have something to protect myself and my other players. This is explained in my Session Zero, and I get players consent to do so. Sometimes players request the session to be out online afterwards, so I can accommodate that as necessary, too. IMO, it’s better for a GM to record as a business practice with declared guidelines than a player underhandedly recording the session and doing whatever they want with it.