My bank offers virtual cards. Can generate and disable them in the mobile banking app, no need to go to the physical bank for it. I have a card for each service

My bank offers virtual cards. Can generate and disable them in the mobile banking app, no need to go to the physical bank for it. I have a card for each service I pay for. Also useful for "free" trails that wants you to enter a CC. Oh and the the whole virtual card feature is free from my bank, no extra card fees etc. (I'm not in the USA)