Reply To: I activated a campaign from the 1 year ago, At then the ACOS was 12 %.

    Stephen
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    There can be different reasons for the increasing ACOS of campaign. If this was manual campaign targeting keywords then keyword statistics and competition might have changed, if this was auto campaign then you might need to work on your content, if this was ASIN targeting campaign then there might be more reviews and ratings on those ASIN’s, so there can different factors which will be affecting your campaign

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