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....