To learn more about setting up your account, refer to:
Creating Sites, Apps & Ad Tags
Creating sites and apps in PubMatic greatly enhances the granularity of your reporting for your account. Sites are often created for different areas of a website and must be created prior to creating the ad tags that will be applied.
An ad tag is code that is inserted into the source code of a web page or app that is used to retrieve an ad from an ad server. Watch this video to understand how to create ad tags in the PubMatic platform.