Reducing ad spend in PPC requires strategic optimization. Start by using negative keywords to filter out irrelevant traffic and focus on high-performing, relevant keywords. Adjust bids for underperforming terms, and consider lowering bids for less important times, regions, or devices. Pausing low-performing campaigns and setting budget caps will further control spending. Refining ad copy helps improve click-through rates (CTR), reducing wasted clicks. Auto campaigns can be useful for discovering new keywords but should be closely monitored to avoid overspending.