Negative Keywords are specific terms or phrases that advertisers exclude from their pay-per-click (PPC) or search engine marketing (SEM) campaigns to prevent their ads from appearing in search results for those keywords. By defining negative keywords, advertisers can avoid targeting irrelevant or low-quality traffic, thereby improving the efficiency of their campaigns and ensuring that their ads reach a more relevant audience. For example, a business selling luxury watches might use “cheap” as a negative keyword to prevent their ads from showing up in searches for “cheap watches.”