Offering a loyalty program is an effective way for retailers to acquire new customers, but it also fosters relationships for years to come. Setting up the framework, however, can be challenging—especially if retailers decide to handle everything in-house.

Advertisers' most-used identifier, the third-party cookie, is going away in less than a year. Mark Connon, general manager at identity graph provider Tapad, joins eMarketer principal analyst at Insider Intelligence Nicole Perrin to discuss the difference between identity and identifiers, why the digital media ecosystem should be prepared to work with several identifiers going forward, and what will happen when Apple's AppTrackingTransparency framework rolls out.