Third-Party Cookie (3P Cookie) - Definition
Digital advertising is the land of acronyms and technical terms. Our glossary can help you make sense of it all with definitions of the most common terminology.
What is Third-Party Cookie (3P Cookie)?
A third-party (3P) cookie is created by domains other than the one a user is directly visiting. These cookies are placed on a user's device by external websites or services, often for tracking and advertising purposes. 3P cookies store cross-organization addressable identifiers, which allow marketers to gather valuable insights into user behavior across different websites and platforms. This data helps improve engagement by enabling more personalized ads, enhances measurement by providing deeper analytics, and supports optimization by identifying patterns in user interactions. While 3P cookies are highly effective in digital marketing strategies, they are increasingly scrutinized for privacy concerns, leading to changes in data collection practices across the industry.