What Is First Party Data?

Death at the death of the third party data is kindofke a trendy topic right now. The change between first party and third party used to be all about license o like, give me everybody who's interested and on mine advertising. And as you're losing more third party data, which third party data would be, facebook has their pictl almost every one sight in the world. But that's very different then targeting you based on emal dress because i know you are interested in my company or my product.