A "Bidder" is an individual or entity that offers a specific amount of money for an item or service during an auction or bidding process. Bidders compete against each other to secure the desired item, and the highest bid typically wins. This process can occur in various settings, including real estate, art auctions, and online marketplaces. In many cases, bidders must register before participating and may need to meet certain qualifications. The bidding process can be live, where participants are present, or online, where bids are placed through a digital platform. Successful bidders often receive a contract or receipt confirming their purchase.