How can I shield my website with malware

How can I shield my website [Invivo Biosciences](https://invivobio.net/) with Malware Attacks, however developer linked it with Cloudflare, but I am very curious for more security. Please suggest anything which I must needs to be done for good security.

Have a look at screenshot, it’s already showing that Cloudflare is linked

You can increase your site’s security level to challenge more visitor requests.

How can do it? Did you mean SEO for website?