To secure transactions with your site by useing SSL/TLS protocol, perform the following steps:
1 – Install an SSL/TLS certificate on the site.
2 – Logged in to Plesk.
3 – Go to Websites & Domains.
4 – Click Hosting Settings below the site’s name at Websites & Domains.
5 – Switch on below.
– SSL/TLS support.
– Permanent SEO-safe 301 redirect from HTTP to HTTPS.