This is where you select the type of campaign you want to track and the omnichannel source you wish to measure your campaign towards.

Define Activation Medium: Select the type of campaign you want to track.
Set the medium of your campaign and choose where your campaign appeared. The activation source is predefined as Banners, but you can adjust it based on where your campaign was active.
Omnichannel Source: Choose where your campaign was active. (Predefined as eShop, but adjustable based on activation location.)

How to create a new campaign