Hey there Jacob! Currently, the description in the global settings for your group event will apply to all of them. There is not a way to assign unique descriptions for individual group events. 

However, this is a fantastic idea! We are going to add this to our feedback center. This means other Thryv users will be able to see this request and vote for it. You will also be notified in the event this feature is added to our roadmap. If any other Thryv users would like to see unique descriptions for individual group events, let us know in a comment!