A dedicated SSL certificate is recommended if you are accepting payments on your site through Event Espresso 3 or Event Espresso 4.
More information on SSL certificates is available here:
Here is a sample text that you can share with your webhost on getting more information on SSL certificates.
Hello! I’m using an ecommerce plugin called Event Espresso on my WordPress site: example.com I am wanting to accept payments on my website and I would like to add a dedicated SSL certificate to make my website more secure. Could you tell me about some of the options that are available for a dedicated SSL certificate? Thank you for your help.