[VictorBonillaS]

This happened to me about six months ago, and my first reaction was to start changing bids and campaign settings. Thankfully I decided to wait one more week and review the data carefully. It turned out there was no problem at all—mobile searches had simply increased while desktop demand temporarily slowed down. If I had made major adjustments immediately, I probably would have hurt the campaign instead of helping it. Sometimes the best decision is to stay patient, keep monitoring the data, and only make changes when there's clear evidence that something actually needs fixing.

 

[MeganBoone]

I wouldn't worry unless your conversions have also dropped.

 

[jchristian481]

My campaigns are around 80% mobile these days, so this doesn't seem unusual.