To be fair, the focus of the article was an introduction to TLS certs, what's in them, and how they're used. There's a lot of complexity, confusion and jargon i

To be fair, the focus of the article was an introduction to TLS certs, what's in them, and how they're used. There's a lot of complexity, confusion and jargon in this topic and Julia made a good call not go into the rabbit hole of public key encryption. Perhaps it would have been better to just say the RSA key "is used as part of the process" of encrypting traffic between browser and server.