In Bid Opportunities, what is the difference between "My Bids", "Bids", "Bid Ads", and "Matched Bids"?

My Bids: A list of projects you have selected to watch ("hearted") or are a Prospective Bidder for. To add to this list, select the heart icon at the top of the bid information.

Bids: Projects posted by agencies using the PB System™.

Bid Ads: Bid Advertisements posted by some agencies and primes using the PB System™.

Matched Bids: Projects matching the notification criteria set in your VendorLine Profile.