Besides anonymity, what everyday problem do VPNs and proxies solve by masking your IP — and what is the catch?

Masking your IP lets you bypass geoblocking (region-locked content) by appearing to connect from another country — but it does not make you anonymous on its own.

* VPN tunnels linking remote users to a private network. — Ludovic.ferre, CC BY-SA 4.0, via Wikimedia Commons. *

Because an IP address can be geographically located, services restrict content by region ("geoblocking"). A VPN or proxy masks your real IP behind the server's IP, so you appear to be somewhere else.

• Practical example: streaming services lock certain shows to certain countries; routing through a VPN server in another country virtually relocates you and unlocks that catalogue.
• The catch: changing where you appear to be is not the same as being anonymous. The VPN provider now sees all your traffic, your browser fingerprint is unchanged, and metadata patterns persist.

Tip: "Hide my IP to dodge a geo-block" and "hide my identity from a serious adversary" are different goals — a consumer VPN is good at the first and weak at the second.

Go deeper:

• Geo-blocking (Wikipedia) — the region-locking IP masking circumvents, and its limits.
• Virtual private network (Wikipedia) — why a VPN relocates trust to the provider rather than granting anonymity.