If you turn on extensions for Gemini, your conversations may be shared with third-party services connected through those extensions. The data shared with extension providers is governed by those providers' own privacy policies. Google is not responsible for the privacy practices of third-party extension providers.
Extensions dramatically expand the data sharing surface beyond Google, creating a chain of data processors whose privacy practices users are expected to independently evaluate — a significant consumer protection gap.
Every conversation you have with Google Gemini is stored by Google for up to 18 months by default and may be read by human reviewers for safety and quality purposes, meaning sensitive personal information shared in chats could be accessed by Google employees. Your Gemini conversation data may also be used to train and improve Google's AI models unless you opt out, creating a persistent data footprint that extends well beyond the immediate session. You can turn off Gemini Apps Activity at myactivity.google.com to stop future conversations from being saved, and you can delete past conversations from your Gemini activity history on that same page.