Conversions only coming from one city suddenly

Hey everyone,
My campaign was converting from multiple locations before, but now almost all conversions are coming from just one city. I didn’t change geo settings.
Is this normal distribution change or something broken in targeting?

This can happen when the ad system starts focusing on the city that is getting the best results.

honestly I think performance is still profitable, it may just be optimisation. but if results are down, I review geo reports and search terms to make sure nothing is weird changed.

I've seen this happen before, especially with automated bidding. If the platform's algorithm finds that one city is converting more efficiently, it can gradually push more budget there even when your geo targeting hasn't changed.

That said, I'd still check a few things. Look at impression share by location, recent bid adjustments, audience settings, and whether conversion tracking changed around the same time. Sometimes it's just the algorithm optimizing toward the best performing area, but sometimes a tracking or attribution issue can make one location look much stronger than it actually is.