You can set up extensions at the customer, campaign, or ad group level by using one of the following services:
The actual workflow of using these three services is identical. You must use the one that corresponds to the type of resource you would like to attach your extension to. A customer extension setting will apply to all ads in an account, a campaign extension setting will apply to all ads within a given campaign, and an ad group extension setting will apply to all ads in a given ad group.
The examples in this guide will use the
they should be easily adaptable to use with either of the other services.