Need clarification on Leveraging more Cloud Run Services

Apologies for the late query,

The Additional Info section for submission has,

"OPTIONAL for Bonus Points (Max 0.4) List any Cloud Run services used (need a front & back end - leveraging more Cloud Run services)"

What should we actually enter here, names of the cloud run services and jobs used in our project? what does need a front & back end mean? Also there's a character limitation of 255, not enough space to include details of the cloud run services and jobs.

There is no section for google cloud project id, so how will the names of the cloud run services be validated?