About
A request is:
- same-site if its target's URI's origin's registrable domain is an exact match for the request's initiator's (the parent),
- and cross-site otherwise.
A cross site request is also known as:
- a cross website
- or cross domain (What is a Domain?)
Articles Related
Example
Tracking
How does Cross-site / Cross-domain tracking work? (known also as Site linking)