CFBundleURLTypes/CFBundleURLScheme - googleusercontent.apps...???

I found this in my older code base as I’m updating an older app.

Anyone have any idea what this is for on iOS?

In this pList section: CFBundleURLTypes//CFBundleURLSchemes

“com.googleusercontent.apps.751583346943-rhjheg9tf8dhbk0ueu0lq15806mbs3fn”
??? any ideas?