Digital walled gardens (think Google, Facebook, Apple, Alibaba) have risen to dominance due to their sheer popularity with consumers, now commanding nearly 70% of all internet usage. These closed systems allow providers to offer consumers a seamless experience, which they love. But as a marketer, working with closed ecosystems makes it difficult to get a total view of your marketing across different channels. It can limit data sharing, the cross-provider activity of your customers, and conversion tracking. In this talk, Sojern helps marketers navigate this complexity and provides ideas, strategies and options for bridging across walled gardens, which otherwise make multi-channel marketing such a challenge.