How does the use of negative keywords with broad match modifiers influence campaign efficiency when the keyword list contains words with multiple meanings in Japanese?

Using negative keywords with broad match modifiers is essential to refine campaign efficiency when a keyword list contains words with multiple meanings in Japanese (homonyms). Japanese has many homonyms that can lead to irrelevant ad impressions if not carefully managed. Broad match modifier (BMM) allows ads to show for searches containing the keyword or close variations, regardless of word order. Negative keywords prevent ads from showing for specific search term....