In a previous blog post I discussed why first-party data is the most valuable data asset today, offering companies valuable insights into their own media users to identify ad messages. Having said that, it is still important to recognize the pitfalls of relying solely on first-party data. While it allows us to better target existing customers, it falls short when it comes to reaching new potential customers, as it only reaches customers who have previously interacted with our data sources. Third-party data complements first-party data to expand reach and create opportunities to acquire new customers.