I am new in adwords, i just recently setup my Adwords Campaign Display network Impression now i want to know how do i know my ads run, I also tried Preview ad Diagnosis but its always said ads are not running it seems Preview ad Diagnosis are only for Search net work not for Display Network someone please help me this
You can find all necessary info here on official website: https://www.google.com/ads/displaynetwork/manage-your-ads/measure-track.html