I find it easier if the other person is a podcast listener.
“You know how podcast ads usually say ‘listen to it in Apple or Spotify or wherever you get your podcasts?’ It’s a bit like that.”
If not, I have to say something weak or complicated like “it’s a bit like email, dunno how to explain this if you have never thought about how email works, though”.
Because it has potential for spoofing.
“Hey, download this press kit from
https://totallylegitsite.com:stringofnonsense@document.zip/
” looks like it’s going to a legit site, but it’s not.