Very Interesting, since my original thumbnails were %1 CTR I tried new one by adding to the campaign. But it spend hefty amount of credit compare to original thumbs. It has very good CTR but I am not sure if it works because it has very few impressions despite the good amount of credits. Since I got more clicks with few credits by my original thumb I closed the bottom one in reference image.
What is the reason, why it doesn’t linearly spend the credits like 10 ad credit 90k impressions. It spent 14 credit just for 4500 impressions.
Also another question if anyone knows, my thumnbnails give me bad CTR at start so I make new ones to add to the campaign. But everytime it restart the learning phase of campaign. Do I do something wrong by always restarting the learning phase or it’s just an unimportant thing so I can continue how I do.?
Whether you should or shouldn’t depends on whether you believe the ad actually performs well or not. A 9% ctr is extraordinarily high, but I’d be cautious since it may not have updated yet.