How can multiple Campaign records be associated with a single Opportunity?

Campaign Influence enables the association of multiple campaigns with a single opportunity, allowing organizations to attribute success and track the impact of various marketing efforts on a sales deal.

Campaign Hierarchy organizes campaigns into parent-child relationships for reporting and management but does not directly link multiple campaigns to an opportunity.

Campaign Members represent individual leads or contacts associated with a specific campaign, not the association of multiple campaigns with an opportunity.

Primary Campaign Source is a single field on the Opportunity object that links only one campaign as the main source, unlike Campaign Influence which supports multiple associations.