Hypertext Transfer Protocol Secure - the secure version of HTTP that uses SSL/TLS encryption. Like regular mail vs. certified mail - HTTPS ensures your data can't be read by others.
When you see the padlock icon in your browser, it means the website is using HTTPS to protect your information.
HTTPS is an Internet protocol (not a single cloud service). All major clouds support HTTPS endpoints across services like load balancers, API gateways, and CDN/edge products by attaching TLS certificates and enforcing HTTPS.