Bidding strategies in digital marketing involve choosing how to set the price you pay for ad placements. Manual bidding lets you set bids yourself and adjust them based on how well your ads perform. Automated bidding uses algorithms to change bids dynamically to meet your campaign goals, like maximizing clicks or conversions. The process starts with selecting a strategy, running the campaign, monitoring results, and then optimizing bids or changing strategies to improve performance. Understanding when and how bids change helps you control your ad spend and get better results.