SCP - secure copy. It is used to copy files between servers securely. The transfer can happen either between a local host and a remote host or between two remote hosts. SCP uses the same authentication and security procedure that is used by the SSH protocol.
The basic syntax is at follows:
scp <username>@<source-host>:<path to file> <username>@<destination-host>:<path to store file>
If you’re on your local wanting to receive a file from a remote server:
scp <username>@<remote-host>:/path/to/file /path/to/store
As for all linux commands you can get extra information about its usage by typing man <command-name> in the terminal.
Do a man scp to get more information about the scp command.
Cheers!