To get a green Padlock on your website, you will need to Install an SSL Certificate.

Getting an SSL Certificate

Installing an SSL Certificate

You can use Your own Private Key and Certificate, but in this article we will cover how to use the ones generated before.

Wait for your Certificate to be issued. (Status: Active)
Login to the cPanel, Click SSL/TLS and Configure.
Copy and Paste the Private Key and Certificate shown in our Client Area to the Appropriate Boxes in the cPanel.
Wait a few minutes and visit your website with https://!

Note: If you lost your Private Key, you will have to request a new Certificate.

Forcing the use of HTTPS on your Website

Without Cloudflare

Login to the Online File Manager or your own FTP Software.
1.1. Select your domain if it's an addon/subdomain
Go in the htdocs folder.
Edit or Create the .htaccess File (Must be named .htaccess)

Paste the Following Content and Save it.

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

With Cloudflare
If you’re using Cloudflare on your website, you can let Cloudflare to enforce HTTPS for you.
Login to the Cloudflare Dashboard, Select Your Domain, Select SSL/TLS then "Edge Certificates", and enable “Always use HTTPS”. Enabling "Automatic HTTPS Rewrites" is recommended too to avoid getting "Connection is not fully secure" Error