"SSL" stands for Secure Sockets Layer, a protocol designed to provide secure communication over a computer network. SSL is significant because it encrypts data transmitted between a user's browser and the web server, ensuring privacy and data integrity. This protection is especially critical for sensitive transactions, such as online banking or shopping, where personal data is exchanged. SSL certificates, which authenticate the identity of the website owner, build trust with users. As a result, SSL is a foundation of secure online communication, serving as a vital component for internet privacy and security.