It's called telemetry. It means Windows sends data back to Microsoft about what you're doing.

Have some light reading:

"required" spyware: https://learn.microsoft.com/en-us/windows/privacy/required-d...

"optional" (but on by default) spyware: https://learn.microsoft.com/en-us/windows/privacy/optional-d...

This is my favorite:

  Data Description for Browsing History data type

  Microsoft browser data subtype: Information about Address bar and Search box performance on the device

   * Text typed in Address bar and Search box
   * Service response time
   * Autocompleted text, if there was an autocomplete
   * Navigation suggestions provided based on local history and favorites
   * Browser ID
   * URLs (may include search terms)
   * Page title and notification text