When a file is shared to your CCBC email address, you will get a notification in your CCBC email. Open the file
When you have permission to edit a file you will have access to its editing options[1]
This is the view for a read-only user[2]
You can receive a link to a document through different means.The image below shows a link[3] shared through Microsoft Teams chat

Note: You will not receive a CCBC email notification when a document link is shared through any method other than email.