A "Negative Match" refers to a situation in data analysis or search algorithms where a specific item or criteria does not align with the desired parameters. For example, in a database search, if a user is looking for records that do not contain certain keywords, the results would be considered a negative match. This helps in filtering out unwanted information. In marketing, negative matching is often used in online advertising. Advertisers can specify keywords that should not trigger their ads, ensuring that their campaigns reach a more relevant audience. This technique can improve the efficiency of ad spending by avoiding irrelevant clicks.