A computer system for providing digital advertiser referrals comprising a third party referral provider operable to maintain a store of digital referral objects, each digital referral object associated with an advertiser for referral to a consumer. The third party referral provider being further operable to engage with a consumer while the consumer is accessing digital content on a publisher site subscribing to the third party referral provider by way of a computer presentation interface, such that once the consumer has engaged with the third party referral provider, the third party referral provider is operable to refer one or more of the advertisers to the consumer through presentation of an associated digital referral object on the presentation interface.