Shows the accumulated amount of e-commerce events, that a user generated in the course of a visit after a campaign click.
All e-commerce events on the campaign landingpage are not considered for the calculation of the engagement. The same goes for the achievement of a website goal (e.g. order generated).
The visitor accesses the website via a SEA campaign. In the course of the visit he generated a product view, adds two products to the shopping cart and generates an order (website goal). The visitor reaches an "Engagement (Campaigns)" of "3".