Glossary
Domain rotation
Switching traffic between several domains so that links keep working when a domain gets blocked, flagged or banned. Networks and trackers do it for click and lander domains; in gambling it is routine, because regulators keep adding domains to block lists.
Also called: rotating domains, domain switching, domain rotator.
The basic version is manual: a pool of parked domains with SSL, and when the active domain dies, you swap it in the tracker and wherever the link was published. The better version keeps the published address stable and rotates only what sits behind it, so the swap is a single setting. Blocklist monitoring tells you a domain is in trouble before the traffic report does.
The line between maintenance and evasion is who the domain is hiding from. Replacing a domain that a browser, a filter list or a network blocked is housekeeping. Rotating domains so that an ad platform keeps approving ads it already rejected is what Google's Circumventing systems policy describes as creating new websites to show ads similar to ones already disapproved, and Google suspends accounts for it without prior warning.
Related terms: Tracking domain, Mirror site, Cloaking, Ban, Gambling.