By Jerelle Gainey on October 6th, 2017
Today, the default setting of all Safari browsers is to block third-party cookies that are dropped by domains other than the domain of the URL to which the user browsed. However, when a user clicks on an ad, the cookie dropped is treated as a first-party cookie. This is because a click gets routed through the ad network domain and therefore is treated as a first-party cookie.
iOS 11 will change the concept of a first-party cookie. Intelligent Tracking Prevention (ITP) puts restrictions on whether advertisers can continue to read or update first-party cookies when the user is not directly on the business’s site. In other words, it affects whether a company can access first-party cookies in a third-party context. In the first 24 hours, the cookie acts exactly like it used to – and can be used for retargeting and conversion tracking. So, if you click on ad, you can be retargeted and your conversions tracked for exactly 24 hours. For the next 30 days, the cookie lets you login on-site, but cannot be used for retargeting or conversion tracking. After 30 days, the cookie is purged from the browser.
A blog post by Apple WebKit security engineer John Wilander explains that ITP builds on Safari’s existing default blocking of third-party cookies and “reduces cross-site tracking by further limiting cookies and other website data.” ITP is aimed largely at limiting pervasive (according to Apple) retargeting practices rather than disrupting advertisers’ ability to track ad campaign performance.
Apple’s new technology tightens Safari’s restrictions on the management of third-party cookies. It does not block ads online but does prematurely delete third-party cookies for advertising retargeting and measurement, and so it obstructs conversion attribution, as well as the recording of user behavioral histories (i.e., it blocks the formation of cookie-based audiences).
We’re currently monitoring the actual impact of this development very closely, but below are some common expectations by various advertising organizations:
All BKV media teams are currently monitoring this change very closely and will make the necessary adjustments to campaigns to mitigate the impact of this change. Want to learn more? CONTACT OUR EXPERTS.