It is essential for many websites, especially you have built a website using open source CMS. So it is very often that a website was hacked, sending spam emails or it could be worst obscene pictures were uploaded. And these attacks have a great impact on your brand and business.
How are you informed if your website is not blacklisted by search engines like Google? Do you know your website will be banned if it has been malicious? So your website will be listed as an unhealthy website by the renown anti-virus software. If no one can visit your website, you will lose business. The damages cost you a lot of money.
Like WordPress, Joomla. Drupal or similar and Sucuri website firewall is effective. It protects from brute-force attacks, DDOS attack mitigation and prevents attacks and malware. It virtually patches and harden your website uptime and includes a server-side scanner at 6 hours interval. Also, the CDN can speed up your website.