The CAPITAL names will require being replaced with your own specific uses:
DATABASE_NAME: This is the name of the database your wanting to import to.
USERNAME: This is the name of your device/computer user currently being used.
DATABASE_FILE_NAME: This is the SQL file name that you moved to your desktop.
*Important: If you did not move the database .sql file to your desktop, then you'll want to change the path the reflect it's location. So for example, if you left it in your "downloads" folder you'd want the path to reflect that folder name.
On running the command, it will prompt you for a password. This is the password of your root user in MySQL. So if this is a default installation of AMPPS with no customization, chances are you're using the default password and that is "mysql".
10. Once done, you can check the database to see if the import was successful.
If done correctly, there should be no issues.
You may want to go in and edit the URL paths in the database tables, especially if using WordPress, you'll want to edit the wp_options table to reflect the new localhost URL that you're using.