Google made some updates to Gemini:

• Temporary Chats - Standalone convos that don't affect future chats, aren't used for training/personalization, and disappear after 72 hours
• The "Gemini Apps Activity" setting will be renamed "Keep Activity" - if this is turned on, "a sample of your future uploads will be used to help improve Google services for everyone"

You can find it under Settings & help → Activity. Mine still shows the old name, and I'm not allowed to turn it off ("This setting is currently not available for your account type.") Maybe that will change when it gets renamed?