CDPs and DMPs both collect customer data. But DMPs gather third-party data like cookies and browsing data and combine it with an organization's own customer database. This data is used to create segments and target customers with ads on different sites. CDPs are primarily used for segmenting customers within the company’s sphere of influence. Since DMPs are primarily used for ad targeting, they wouldn't help an organization create a personalized experience within the company's own products and touchpoints.