What is the direct effect of implementing negative keywords within a DuckDuckGo Ads campaign?

The direct effect of implementing negative keywords within a DuckDuckGo Ads campaign is to prevent your ads from showing for searches that contain those negative keywords. This means that if you add 'free' as a negative keyword to your campaign for 'premium software', your ad will not be displayed when someone searches for 'free premium software' or any other query that includes the word 'free'. By excluding irrelevant searches, negative keywords help improve campaign efficiency by reducing wasted ad spend on clicks from users who are not interested in your product or service, thereby increasing the overall relevance of your ad traffic.