I spent 10 mins trying to find a clear statement of whether Google uses information submitted to Gemini for training and I couldn't find one. It is hard not to come to the conclusion they actively try to obfuscate it because there are many statements that vaguely sound like they should address it but then don't properly do that.
So I would have to suggest, use these features with extreme caution on any page you consider private if you aren't prepared for your private information to get sucked into Google's Gemini training data.
So I would have to suggest, use these features with extreme caution on any page you consider private if you aren't prepared for your private information to get sucked into Google's Gemini training data.