Auction platforms are online marketplaces where buyers and sellers can engage in bidding for various items. These platforms allow users to list products, set starting prices, and specify auction durations. Popular examples include eBay and Christie's, which cater to different types of goods, from everyday items to high-end collectibles. Participants can place bids on items they are interested in, and the highest bidder at the end of the auction wins the item. Auction platforms often provide features like bidding history, seller ratings, and secure payment options to enhance user experience and ensure trust among participants.