The Google contributions profile URL serves as a central dashboard for managing user interests, saved search collections, and Knowledge Panel verifications using the primary logged-in account. This page, distinct from Google Maps profiles, allows for the management of topics followed in Discover and the addition of authorized users for entity management. More information is available on the Google Support website. Google Help Get verified on Google - Knowledge Panel Help

4. Understanding the authuser=0 Parameter

The authuser parameter is not for manual typing. It is automatically added by Google when you have multiple accounts logged in.

However, the authuser parameter ensures that if a user is logged into multiple Google accounts, the browser serves the data for the default (first) account. This prevents data crossover between, for example, a personal Gmail account and a work Gmail account.

6. Discussion

Option 3: Google Takeout (For a full backup)

  1. Visit takeout.google.com.
  2. Deselect all, then choose My Activity and Maps (your contributions).
  3. Export and download your contribution history.