Cookie lifetime, Safari’s caps and what first-party really means. 4 articles
Which domain a cookie belongs to, what each browser does with it, why that decides your attribution windows and audiences, and what server-side changes.
Safari 16.4 caps cookies from a tagging subdomain on another server at 7 days. How to check it, and how serving tracking from your own domain fixes it.
Why Safari caps your tagging subdomain's cookies at 7 days, and how serving tracking from a path on your own website keeps their full lifetime · setup per platform, the checks, and what to switch afterwards.
Why first-party server-side tagging helps with ITP restrictions — and what it can and cannot fix.