This seems to be such a widespread misunderstanding. The reality is that we are all using TLS all of the time but for some reason the term SSL has just stuck.
In the beginning (well in 1995) there was SSL, a cryptographic protocol for encrypting information over an internet connection. SSL evolved over time and in 1999 the name of the version was changed to TLS. You will hear a lot of people still referring to SSL, but unless thy are talking about a protocol that has been deprecated for over a decade, they actually mean TLS.
I covered a bit more about this in a blog article I wrote a while back:
https://s-4.host/why-we-disable-tls-1-0-1-1/