The status codes are all three-digit numbers that are grouped by the first digit into 5 groups. The reason phrases given with the status codes below are just suggestions. Server can return any reason phrase they wish.
No 1xx status codes are defined, and they are reserved for experimental purposes only.
Means that the request was processed successfully.
- 200 OK
Means that the server did whatever the client wanted it to, and all is well.
The rest of the 2xx status codes are mainly meant for script processing and are not often used.