PCI compliance ( PCI DSS – Payment Card Industry Data Security Standards) is only required when your business relay, stores, handles or accepts credit card data of users. If you don’t store the data in your database but use a 3rd party payment processor then also your hosting must be PCI compliant.
If you do not do any of the above then it’s not mandatory for you to host your application or website on a PCI-compliant hosting server.
Why It’s Important: If you as a business store sensitive custom financial data, like credit card numbers, then it’s very important to be on a PCI compliant hosting so that your organization not only avoid exposing that data to hackers but also avoid legal actions, monetary fines or permanent ban from card acceptance programs.