How can I properly leverage encryption to secure sensitive data within an app?

To effectively use encryption for securing sensitive data within your app, start by determining which data needs encryption - this typically applies to personal, financial, or confidential information. Use strong, industry-standard encryption algorithms like AES (Advanced Encryption Standard) for data at rest, and TLS (Transport Layer Security) for data in transit. Also, implement key management best practices, such as rotating encryption keys regularly and storing them securely using hardware security modules (HSM) or key management services. Finally, ensure your encryption strategy is compliant with relevant legal and industry standards like GDPR or PCI DSS.