Using HTTPS, which employs SSL/TLS, ensures that data transmitted between the client and server is encrypted, protecting sensitive information like login credentials or payment details. It also guarantees data integrity and authenticates the server, preventing tampering and man-in-the-middle attacks. For most scenarios, this is sufficient, provided the TLS version (e.g., 1.2 or 1.3) and server configurations are secure. Additional encryption may only be needed for compliance, untrusted intermediaries, or sensitive data storage. By exclusively using HTTPS, implementing robust authentication, and avoiding sensitive data in URLs or logs, you can achieve strong security without unnecessary complexity.