Project Contributors tab provides you with the list of cards which provides you with the information related to the contributors from your organization contributing for the project. This tab provides you the information on the following:
Top project contributors based on commits
Top project contributors based on PRs submitted
Top project contributors based on issues raised
Top project contributors based on the email messages exchanged
Top project contributors based on the chat messages
The contribution from the contributor may be in the form following list which can be seen in the cards:
Commits
PRs submitted
Issues raised
Email exchanged
Chat messages