Breaking this down, the Server IP is the set of numbers before the : symbol, and after this are the last five numbers which are the Server Port. In the example above, the server address is 192.198.1.1:12345. This will be labeled as Server Address, as shown in the screenshot below. If you own a Shockbyte server, you can find your server's address on your Rust Server Panel.
To get started, you need to identify the address of the server you want to join.