It's the ability to take a picture of a check and deposit it into your account that way, vs having to take the check to an actual branch of a bank.
Here in the US, I still get checks frequently enough that it's nice to have.
What's hilarious is that at the end of the day your transaction is added to a text file and sent along with the image to the Federal Reserve Bank Clearinghouse via SFTP. It's then communicated back to the other bank in the exact same way.
Oh, cheques.
I don't think I've seen one of those since the early 90s. Do people still use them?
I'll bet the confusion stems from the rest of the world having essentially forgotten what is a check/cheque almost a generation ago.
I only used them twice in my life, last one was in 2012 and I had to get a supervisor at the bank to find the procedure to get a checkbook at the time.