Because of competition or demand spikes in your niche especially during seasonal periods.
I think it's not because of the market recently CPC suddenly increased even though I tried a lot of new targets
It looks like people will be spending less on advertising between now and Christmas.
Maybe Facebook has new mechanisms that make the old campaign no longer suitable, so CPC increases. I think so too.
Maybe Facebook's mechanism has changed a little bit, my friend.
it happens all the time. There are many reason for that. Facebook change the algorithm of delivering, the creatives is "old",... It's so random. You have to have new creatives all the time. Can't lay on 1
A sudden CPC increase on Facebook Ads can happen due to higher competition in the same audience, seasonal demand (like Q4 or holiday traffic), or ad fatigue - when your audience has seen the same creatives too often. Also, Meta’s algorithm can shift bidding behavior after updates or budget changes. Try refreshing creatives, checking audience overlap, and reviewing bid strategy and placements.
The CPC boost variation is often not just a single service campaign, but a market-wide effect.
