I will install and configure an ssl certificate for any cms (Opencart, Bitrix, Drupal, WP, Modx) or just an html site (I will translate to https).
Recently, search engines are increasingly giving preference to sites that have a security certificate (SSL) installed. The http protocol is no longer secure
In this regard, almost all developers have already abandoned the unprotected HTTP data transfer protocol when creating sites, switched to the secure https protocol.
Provide access to the hosting and to the admin panel of the site (you can install free certificates through the hosting control panel).
If the ssl certificate is installed, then you need access only from the FTP and the site admin panel.