Adding negative keywords to your campaigns can prevent your ads from showing up for irrelevant searches. This reduces unnecessary clicks and ultimately lowers your CPC.

Organize your keywords into tightly themed ad groups to improve the relevance of your ads. Higher relevance can lead to a lower CPC.

Long-tail keywords are more specific and less competitive than short-tail keywords, making them more cost-effective.

Ad extensions make your ads more visible and provide more information to users, increasing the chances of getting a click.

Employ specific match types, such as exact match or phrase match, to ensure your ads only show for relevant searches. This can help lower your CPC.

Test different versions of your ad copy and targeting to find the most effective combinations, which can lower your CPC.

Choosing the right bid strategy can help you get more value out of your budget. For example, using the target cost-per-acquisition (CPA) bid strategy can help you get more conversions for your budget by automatically adjusting your bids to meet your desired CPA.