Some features in Google products use your data to improve and personalize your user experience.

These smart features include:

• Automatic email filtering/categorization
• Smart Compose and Smart Reply
• Email nudges and high priority notifications
• Summary cards above your email showing package tracking or travel updates
• Using event details to create calendar entries
• Assistive writing suggestions
• Intelligent search suggestions

Smart features can be enabled/disabled in your settings.

For Gmail、Chat、Meet:

1. On your computer, go to gmail.com.
2. Click Settings See all settings.
3. In the "General" tab, scroll to "Smart features and personalization."
4. To turn smart features on or off, check or uncheck the box.

See also:
Google in Europe: New settings for smart features and personalization in Gmail
https://blog.google/products/gmail/new-settings-smart-features-and-personalization-gmail/
Smart features & personalization controls in Gmail, Chat, Meet, and other Google services
https://support.google.com/mail/answer/10079371