The Negative Keyword Finder analyses the search terms report from your AdWords and Bing Ads account. It identifies individual words that are part of the search queries and are not performing well. It recommends adding them as negative keywords because they may not be relevant to your account.
Negative Keyword Finder looks at data for the last 90 days to give suggestions for adding negative keywords.
Currently, the AdWords API doesn't allow us to write to MCC level shared lists.
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