Follow entities. Similar to flag. Has issues that break the module. Module page https://www.drupal.org/project/follow_unfollow/ Module tags #Needs work Stability Secure Tags #Content Issues Missing Schema? Install killed my website Automated Drupal 9 compatibility fixes Module issues Automated Drupal 9 compatibility fixes Missing Schema? Install killed my website #Content [Article] EntityQuery [Module] Feeds [Module] Field Validation [Article] Content notes [Module] Entity Construction Kit (ECK)