Let's Encrypt is a fast, useful and simple certificate that several domains and unlimited domains as long as you are using cdmon's DNS servers. However, premium SSL certificates include advantages that will build extra trust in your customers. Some of these certificates allow you to validate your organization and all of them include insurance coverage to cover certain damage produced during their period of use, due to negligence by the company issuing the certificate (subject to the terms and conditions of the company issuing the certificate). We will be delighted to help you if you have any further queries.