SSH (Secure Shell) is a protocol to providing an encrypted channel for logging into another computer over a network and work there.
SCP is like a cp over ssh – coping files from/to remote server over encrypted connection.
So we can use scp to copy file to ssh server:
scp /path/to/local/file user@remote_server:/path/to/destination
scp ~/project/file.txt email@example.com:/var/www/
Also we can get a file from remote server by switching source and destination:
scp user@remote_server:/path/to/destination /path/to/local/file
scp firstname.lastname@example.org:/var/www/ ~/project/file.txt
Be sure that you have enough permissions on your local host and your remote host.