Static IP vs Dynamic IP
A static IP stays the same. A dynamic IP can change over time. Most homes get a dynamic address by default, and for most people that's exactly right.
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Dynamic IP
Your ISP assigns an address from a shared pool and may change it now and then. It's free, it's the default, and it's slightly more private because your address isn't fixed to you for long.
Static IP
A static address is reserved for you and never changes. That's useful if you host services, run a mail or game server, use remote access, or need allow-list access to a work system. ISPs often charge a small fee for one.
Which do you need?
- Choose dynamic if you mostly browse, stream and game. You'll never notice it changing.
- Choose static if you host something others connect to, or need a fixed address for remote access or allow-lists.
- A middle ground is dynamic DNS, which keeps a hostname pointed at your changing IP for free.