When you make a ‘buy offer’ on a stock or other security in the financial markets, you are making a Bid.
A Bid offer in terms of financial markets is the price offered by an investor or trader for a security. A market maker will try to reconcile Bid offers (the highest prices that buyers are willing to pay) with Ask offers (the lowest price that a seller is willing to accept). Match the Bid and the Ask offers, and you’ve got a trade.