If you haven't changed anything, I'd also check whether someone else has access to the account. I once discovered that a colleague had adjusted device bid modifiers without telling me. It took me several days to realize what had happened.
 
Google Ads changes continuously behind the scenes. Even without touching your settings, changes in auctions, competitors, user behavior, and search demand can all influence which devices receive more impressions and clicks.
 
One thing worth checking is whether desktop users are still seeing your ads. Perform a few searches yourself using the Ad Preview tool instead of normal Google Search. That can help verify whether desktop delivery looks normal.
 
My advice would be to avoid making device bid adjustments based on only a few days of data. Wait until you have enough clicks and conversions to identify a genuine trend. Short-term fluctuations happen more often than people think.
 
I manage campaigns for several clients, and I've noticed that industries targeting younger audiences often receive 80–90% mobile traffic now. On the other hand, B2B campaigns still generate a healthy amount of desktop traffic during business hours.
 
Check your website analytics alongside your Google Ads reports. If Analytics also shows a decline in desktop sessions from other channels, the issue may not be related to PPC at all. It could simply reflect changing visitor behavior.
 
I've seen situations where desktop traffic dropped because competitors improved their ad copy significantly. Better headlines and stronger offers attracted more desktop clicks while my ads remained unchanged. Sometimes refreshing your ad copy can make a noticeable difference.
 
If your campaign targets local searches, mobile dominance is almost expected these days. People often search while they're out shopping, traveling, or looking for nearby services. Desktop traffic naturally becomes a smaller portion of the total.
 
One thing I'd definitely review is your Quality Score by keyword. If desktop CTR has fallen while mobile remains strong, Quality Score could gradually influence your desktop visibility over time.
 
I wouldn't assume there's a technical issue unless you've ruled out everything else. Review your campaign settings, landing pages, analytics, bidding strategy, search impression share, and auction insights before making major changes. Often the explanation is much simpler than we expect.
 
If this were my campaign, I'd spend an hour reviewing every device-related report before touching any settings. I'd compare impressions, clicks, CTR, CPC, conversions, conversion value, landing page performance, and auction insights across both mobile and desktop. If all the settings are unchanged and overall performance remains healthy, I'd probably leave the campaign alone and continue monitoring. Traffic patterns evolve over time, and sometimes the smartest decision is simply to let the data guide you instead of reacting too quickly.
 
I ran into this exact situation earlier this year. My desktop clicks dropped so much that I thought I'd accidentally changed a campaign setting. After checking everything, nothing was wrong. About two weeks later desktop traffic slowly started coming back. I never figured out exactly what caused it, but I learned not to panic over a few days of unusual data.
 
When this happened to one of my campaigns, I spent hours looking through every setting. In the end, the problem wasn't Google Ads at all. My landing page had a layout issue that only affected desktop browsers after a website update. Once that was fixed, desktop clicks and conversions returned.
 
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