A marketing campaign collects data for page counts, sessions, orders, and revenue. Four kinds of campaigns are addressed: direct, deferred, site link tracking, and deferred site link tracking. A particular page visit in an end-user session “qualifies” for a campaign if it satisfies the configured conditions for the campaign; that is, if the target universal resource locator (URL) of the page is the landing page of the campaign, the referrer URL is the referrer page of the campaign, or the page tag contains the configured string for the campaign. The data is processed through a set of heuristics identified by marketing experts as the most likely paths to a sale, and exclusivity is assigned to the type of campaign with the highest priority.