Providing your customers with a secure session is crucial – especially for eCommerce and transaction based websites, run on CMS like Magento, Magento 2, Prestashop and others. The best way to do it is to migrate your website to HTTPS. HTTPS (also known as HTTP over TLS, HTTP over SSL, or HTTP Secure) is an internet protocol that makes your site secure thanks to encrypted signal between your site and the user. It is also worth a mention that Google has recently announced using HTTPS as a ranking signal.
Here’s a simple to follow guide how to painlessly move your website.