When it comes to search ads,which description best describes'negative keywords'?

Negative keywords prevent your ads from showing for irrelevant searches. By excluding specific terms, you ensure your ads only appear to users genuinely interested in your products or services, improving ad relevance and reducing wasted ad spend. For example, if you sell "men's shoes" but not "used men's shoes," you'd add "used" as a negative keyword. Keywords with no association to your site are simply irrelevant keywords, not necessarily negative keywords you'd actively exclude. Keywords with a poor search volume might not generate many impressions, but they aren't inherently negative keywords that need to be excluded from a campaign.