Abstract: Measuring influence in social networks, in which a marketing message related to a good or service has been distributed to one or more influencers. An agreement to allow tracking of the influencer's sharing of the marketing message is made. Also, after receiving the agreement to allow tracking of the influencer's sharing of the marketing message, sharing of the marketing message is enabled in a manner that enables tracking of actions taken by users to which the marketing message is shared. Sharing of the marketing message by the influencer is tracked and actions related to the marketing message taken by users to which the message was shared by the influencer are tracked. Data descriptive of an influence of the influencer related to the marketing message is stored and output based on the stored data is provided.