First-party is when the provider of the data is also the owner of the property where that data was collected and used. Google segments used on Google propertie

First-party is when the provider of the data is also the owner of the property where that data was collected and used. Google segments used on Google properties = 1st-party. Google segments used on other sites = 3rd-party. NYT segments used on NYT = 1st-party. NYT segments can't be used anywhere else because they don't make them available nor do they want to.