An advertiser edits an ad and notices that its position is lower than that of the previous version. What's the most likely cause?

An advertiser edits an ad and notices that its position is lower than that of the previous version. What's the most likely cause?

Answer

•  The advertiser's landing page is down for maintenance.
•  The edited ad is less relevant to the keywords in the ad group.
•  The edited ad has a lower conversion rate.
•  The advertiser's budget has been depleted.