As marketers, we use data at every level, from determining Facebook targeting to timing a major product launch. But how often do we take a look under the hood at the quality and usefulness of our data? In this playbook, we’ll cover the strengths and weaknesses of third-party, second-party, and first-party data and where declared data fits into the current data landscape. You’ll learn plays for activating declared data for: Qualified lead generation 1-to-1 email personalization Custom audiences and personalized retargeting Audience building and profiling