To get started, you need to upload your certificate or generate a new one. To do this, on the left side of your personal account, select the section SSL CERTIFICATES, and then in the window that appears on the top right, click "ADD SSL CERTIFICATE".
Adding your certificate
Enter a custom name and specify your personal certificate and private key in the appropriate fields.
Often, to add a personal certificate, you also need to specify a chain of intermediate certificates (there may be several of them). In this case, you need to place the chain in the following order: "personal certificate" -> "CRM (intermediate certificate. Please note that there may be several of them. It is important to follow their sequence)" -> "root (root certificate)". If you have lost the root and intermediate certificates, you need to contact the center where your certificate was issued. Often they are in open form, [example for AlphaSSL] (https://www.alphassl.com/support/install-root-certificate.html).
After successfully adding the certificate, it will appear in the interface with the following information: domain or domains that the certificate covers, the beginning and end of the certificate validity.