Gemini AI generally handles privacy and personal data according to the policies of the service or product that is using it, so the exact treatment can vary by app, account type, and region. In most cases, personal data may be processed to provide the service, improve quality, detect abuse, and maintain security. That can include content you type, files you upload, and certain usage information.
It is important to review the current privacy notice and data controls on the page where Gemini AI is being used, because those documents explain what data is collected, how it is used, how long it may be retained, and what options are available to manage history or activity. Some versions of the service may allow you to turn off activity saving, delete conversations, or manage account settings related to personalization.
As a general caution, it is wise not to share sensitive personal information unless you are sure it is necessary. This includes financial details, passwords, government identifiers, and private medical information. If you are trying to understand a specific feature, the current web page usually has the most accurate privacy information and any available help or contact details.