An offering is a type of offer or bid, like the kind made in a business meeting.
When you offer something—like a cookie—you're asking someone if they want it. An offering is like that: it's an offer. One type of offering is a proposal or bid made in business. A sports team could make an offering of three million dollars a year to a running back. A bidder could make an offering of one thousand dollars at an auction. An offering is a promise to pay that much if the offering is accepted.