& hack protection.
Server security is the responsibility of your provider. But the security of the website rests with you because it depends on many things under your control, not those of your provider, such as the scripts used for your websites.
However, if you are referring to paid third-party addons / tools that claim to offer this protection, consider using a developer to strengthen your website.
If you use a CMS-based website, keep it always up-to-date.
For any website, host each website in a separate cPanel account. This will greatly increase security if your provider offers CloudLinux and also offers performance benefits. For example, if you host 5 websites under one account and one of them is compromised, it is likely that all sites will also be compromised. Even worse, if any of them starts sending malicious emails, the provider might have no choice but to suspend the account to prevent their IP reputation. In such a case, the 5 sites will fall.
Similarly, if 1 GB ARM is available for a cPanel account and you host 5 sites under this account, all sites will share this RAM and each will have less than 1 GB to use. But if you host each site under its own account, each site will have 1 GB of RAM to use. CPU, RAM, disk I / O are the server resources responsible for site performance.
Bandwidth preferably unlimited
There is really nothing unlimited in the hosting industry; it is a marketing term used to attract potential customers. If you see someone offering something unlimited, you can bet that it will limit your use in one way or another. You may want to clearly know your limits instead.