(Web only) Are you including at least one of every banner size?
If you include only banners in one or two sizes with your campaigns, you will miss opportunities to serve banners on sites that use other ad formats.
Perfect Audience accepts banners in the following sizes: 300x250, 728x90, 160x600, 468x60, 120x600, 970x250, 970x90, and 336x280.
The 300x250 and 728x90 are by far the most common ad formats. If you're only making two banners for a campaign, make them in those sizes. But leaving out the other sizes will reduce the reach of your campaign as your ads won't serve in ad positions in the other size formats.
To see the dimensions of the banner ads you've uploaded, go to your "Mange" -> "Ads" page and look at the information in the ads table.
Take a look at some other ways to increase reach:Is your audience large enough?
Were all of your ads approved?
Are you using too many ads?
Is your campaign active and ready to serve?