Media Strategy
Note: This post was updated on May 13, 2022. Please check back periodically for news on this evolving issue.
As you’ve likely heard, after several delays, Google will eliminate third-party cookies by late 2023. What does this mean for the advertising industry and your business?
First, here’s a quick refresher on cookies including the difference between third-party cookies and first-party cookies (codes stored by a website owner on their own site domain).
What are cookies?
A website cookie is a small data file that can be stored in a browser when a user visits a website. The cookie can store a wide range of data but is primarily used for personalization, shopping carts and website preferences.
A first-party cookie is created or updated when a user visits a website (let’s call it currentwebsite.com). In this case, the scripting on the site can only leverage the data in the cookie while the user is visiting currentwebsite.com.
A third-party cookie is a tracking code set on a website the user visited previously (e.g., previouswebsite.com). Typically, these codes are created by advertising networks to capture certain data points that can equip advertisers with the ability to target audiences they consider valuable. When a user visits currentwebsite.com, an advertising network script looks for cookies from previous websites that can help identify the advertiser’s desired audience and serve them relevant advertising.
How do advertisers commonly use third-party cookies?
1. Targeting
This data provides an understanding of consumer behavior including frequently visited websites, purchases and interests. It allows advertisers to target the right consumer and serve them the most relevant message. For example, if a consumer visits three different travel websites within seven days, an ad tech vendor can safely assume this consumer is planning a trip and deliver travel-related advertisements to them.
2. Measurement and Attribution
Third-party cookies also give advertisers the ability to enhance measurement for attribution capabilities, which allows for campaign optimization. For example, third-party cookies help track users across different platforms to create a holistic view of what goes into a conversion. As third-party cookies are phased out, these multi-touch attribution models will become less reliable until another identity solution is realized.
Why are third-party cookies going away?
Removal of third-party cookies is a response to elevated public scrutiny around the handling of user-level data. A growing number of consumers are uncomfortable with how their data is being shared. In turn, they are demanding transparency, choice and control over how their data is used.
Lawmakers and companies alike have responded to these concerns by taking more substantial action through litigation and company policy reform to protect user PII (personal identifiable information). Some companies have chosen to implement permission-based third-party cookies, while others have begun to completely phase them out in lieu of new, alternative solutions.