A campaign can apply to all Web sites in your system (a global campaign) or to one specific site. For global campaigns, an event is triggered when it occurs on any Web site supported by your system. For example, in a global campaign, a Logs In event is triggered when a customers logs into any Web site. For campaigns that apply to a specific site, an event is triggered only when it occurs on that site. For example, for a campaign that applies only to Site A, a Registers event is triggered when a customer registers on Site A but not when a customer registers on Site B or Site C.

One implication of this behavior is that you cannot mix sites in a global campaign. For example, you cannot set up a Visits Page event that waits for a customer to visit a page on Site A and triggers a Publish Web Content action that displays content on Site B. All events and actions apply to all sites. Nor can you mix sites in a site-specific campaign. For more information, see Using ATG Outreach in a Multisite Environment.