Network address translation changes addressing information as traffic passes between network arrangements. In a common home IPv4 setup, it helps several private devices communicate through an outward-facing connection. Translation is separate from the subscription and player, although it can influence how some connections are established or how remote services observe a household's traffic.
A practical example
A home router can translate outbound requests from several televisions using their local addresses. The remote service may see a common public address, while the router keeps track of which replies belong to each internal device's connection.
A common misunderstanding
Do not infer the number of watching devices from one public address alone. Also avoid changing translation or forwarding settings without understanding the particular connection problem and network equipment involved.
Related terms
Stable technical definition. Editorial approach