Dynamic Bidding is a feature that does not allow an item to sell until there is no bidding activity for a specified period of time.
Refer to Dynamic Bidding section of auction terms for full explanation (not all auctions enable Dynamic Bidding).
Example – If Dynamic Bidding extension time is 10 minutes: An item is bid on at 7:50pm. An auction is scheduled to close at 8:00pm. When this bid is placed the ending time will automatically extend to 8:10pm. When another bid is placed at 8:01 the auction will extend until 8:20pm. This will give bidder 19 minutes to place another bid. If no bids are placed this auction will conclude at 8:20pm. The key to your dynamic bidding feature is that the auction extends from the preset closing time in 10 minute intervals, NOT 10 minutes from when you placed your bid.