When implementing contextual targeting, what type of logical operator must be used to *excludespecific keywords related to competitor brands within Yahoo's Ad Manager interface?

When implementing contextual targeting and intending to exclude specific keywords related to competitor brands within the Yahoo Ad Manager interface, the 'NOT' operator (or its equivalent, like 'Exclude' or a minus sign '-') must be used. Contextual targeting involves displaying ads based on the content of the webpage being viewed by the user. To avoid showing ads on pages that mention competitor brands, you need to specifically exclude those keywords from your targeting criteria. The 'NOT' operator ensures that ads will not be displayed on pages containing the specified keywords. For example, if you are advertising 'Brand A' and want to prevent your ads from appearing on pages mentioning 'Brand B', you would use the 'NOT Brand B' or '-Brand B' syntax within the keyword exclusion settings. This tells the system to target pages that are relevant to your product or service, *exceptthose that also mention your competitor. Using an 'AND' or 'OR' operator would not achieve the desired exclusion; 'AND' would require *bothyour keywords and the competitor's to be present, while 'OR' would target pages mentioning *eitheryour keywords *orthe competitor's. Only the 'NOT' operator effectively prevents ads from showing when the competitor's brand is mentioned.