To create ads with third party code navigate to WordPress Dashboard > WPAdCenter > Create Ad
You’ll be taken to the Create New Ad page
Once on this page, follow the following steps:
Set the title of the ad
In the ad type select “Ad Code”
Paste the ad code from the third party advertisers
Finally, you can set the duration you want to run the ad for and hit the publish button.
Once your ad is created you have to place it in the right posts and places. There are multiple ways of doing that and this part is covered in detail in the “Placing Ads section”.