SSL (Security Sockets Layer) and TLS (Transport Layer Security) are both cryptographic protocols provide authentication and data encryption between servers, machines and applications operating over a network (e.g. a client connecting to a web server, mail server). SSL is the predecessor to TLS. Over the years, new versions of the protocols have been released to address vulnerabilities and support stronger, more secure cipher suites and algorithms.
TLS is just an updated, more secure, version of SSL. We still refer to our security certificates as SSL because it is a more commonly used term, but when you are buying SSL from MaxBIT Company.