So I'm running ads on facebook to target users from lets say age 20-30. For each ad that I create I make a new campaign containing only one specific age, such as only 21 year old users. So if I'm running five ads per age I'll have five different campaigns targeted only at 21 year olds. Sorry if I'm over-explaining the sitution. Now for the question. It seems as though only one of the campigns per age and only one of the ads gets a vast majority of the impressions for that set of campaigns. What is the reason for this and how can I fix it? Do I just need to run one ad for each age at a time? Shouldn't the ads just show evenly? I understand that ctr can play a role in how often the ad shows but after say about 20 minutes of showing my ads one ad might have a couple hundred impressions with 1 click and another might have a couple thousand with only one click as well. Thanks for any advice.