Often times, I find an s-tag or conditional in an email, and have only used the group ID number to describe it. Being able to search for a group in Luminate with just the group ID number would be an easy way for me to determine which group I was using in my conditionals.

(New comment: Sorry... i just noticed that this idea has already been submitted! https://luminateonline.ideas.aha.io/ideas/LUM-I-309)