Every platform website receives a free SSL certificate. The certificates enable a secure connection to be established between the customer's browser and the server. Because the data is encrypted from the customer's browser to the server, it helps to prevent hacking and stealing customer information.
All certificates are installed automatically, and you are not required to do anything. If your domain is properly connected, it may take up to 48 hours for SSLs to be installed on a newly connected domain (In most cases it is within the day).