Let guests modify Google calendar event is a Chrome extension developed by jeffbaumes. This free extension adds a feature to the 2017-era version of Google Calendar web application.

With this extension, users can easily check the 'Modify event' box when creating or editing an event in Google Calendar. This allows guests invited to the event to have the ability to modify the event details.

The extension provides a convenient and time-saving solution for those who frequently use Google Calendar and need to grant editing rights to event guests. It seamlessly integrates into the Google Calendar interface, making it easy to use and navigate.

Overall, Let guests modify Google calendar event is a useful add-on for Google Calendar users who want to give their event guests the flexibility to modify event details.