Steam GroupID64 is a unique 64-bit identifier assigned to each Steam group. It allows developers and users to interact programmatically and access information about specific Steam groups via the Steam Web API. GroupID64 is essential for various community-oriented features, such as group management, statistics, and communication within the Steam ecosystem related to its online game.
1. Open the desired Steam Group page on a web browser.
2. Enter the following at the end of the link in the address bar: /memberslistxml/?xml=1