I placed an ad, but Impression does not increase from 0

I placed an ad on Unity Ads, but Impression no longer increases from 0.

There were some Impressions a few days ago, but recently there have been 0 days of Impressions.

Will less conversions reduce ad impressions?

I don’t know why the impressions are reduced.

in trouble. Help me.

There might be an issue with the integration with your attribution provider. If we are not being sent postbacks from when apps are installed from your ads, then our algorithms will only see that your campaign is generating 0 installs and will de-prioritize showing your ads.

Double check to make sure your attribution URL is set correctly and that your attribution provider has all the right info. Then if you boost your bid amount temporarily it should stimulate the system into providing you with traffic. Once we have data and recorded installs, you can reduce your bid amount back down.

If you need us to look at your campaign directly, you can contact unityads-support@unity3d.com with the details of your advertising account and we would be happy to look into it.

the same problem for me too I have called Unity on email and I am waiting