Bidding strategies are techniques used in auctions or online advertising to determine how much to offer for a product or service. Common strategies include cost-per-click (CPC), where advertisers pay each time someone clicks their ad, and cost-per-impression (CPM), where they pay for every thousand views. These strategies help businesses maximize their return on investment. In auctions, bidders may use strategies like sniping, where they place a last-minute bid to win, or proxy bidding, where they set a maximum bid that the system automatically increases as needed. Understanding these strategies can lead to more effective bidding outcomes.