After you set up your Cloudflare protection at Hostinger, you'll be able to manage basic Cloudflare settings through hPanel: just open Hosting → Manage → Cloudflare:
There you will be able to perform these actions:
Button to Enable or Disable Cloudflare. It’s highly recommended to keep it ON all the time. However, if Cloudflare is having maintenance, and your website is having accessibility issues, disabling Cloudflare will bring it back online
SSL / Encrypt communication - here you can adjust your SSL Encryption settings
Security level - this parameter determines which visitors will receive a “Cloudflare is checking your browser” page. We recommend keeping it on Normal all the time and changing it to Under Attack only when you are under a DDoS attack.
Subdomains - here you will see all of your subdomains and will be able to activate Cloudflare for each of them for free
What are SSL / Encrypt communication levels?
Connection between the visitor and Cloudflare
Connection between Cloudflare and webserver
SSL Certificates provided by Cloudflare
Secured but not authenticated
Lifetime SSL, self-signed SSL, other external SSLs
Secured and authenticated
Lifetime SSL, other external SSLs except for self-signed SSL
A comprehensive explanation about each security level can be found here: Understanding the Cloudflare Security Level