Its the actual in more or less real time Bids to buy, and offers to sell a specific stock. So you may see the ask being .0065 for 1 Million shares, the next .0058 for 500K shares, where others are bidding, for perhaps less .005 is the bid for 500K shares. If the person on the ask lowers the price the person on the bid will get the buy. If the person on the bid raises the offer the ask, they will get the buy. Itsc kind of like an auction for stock with a minimum sell. Make sense?