Joanna 在一个推广活动中投放 4 个广告素材，但其客户对该频率提出质疑。Joanna 应该怎么做？

Joanna should review the LinkedIn frequency report because it provides data on how many times users have seen her ads. This report will help her understand if the ad frequency is indeed too high, as her client suggests, or if the perception is inaccurate. Based on the report, she can then make data-driven decisions to adjust the campaign. Increasing or decreasing the number of ad creatives without first checking the frequency report would be a guess, not a strategic move. Choosing a broad delivery tool would likely increase, not decrease, the frequency, which is contrary to the client's concern.