How to make a selection of cards in your online store?

Question

Online shopping

Hello!
Recently, I often see that when paying on a site (such as on ali), you can save the card right there, and then use it the next time you pay.
How to implement this for yourself? It’s illegal to keep cards just like that, as I understand it, but how do others do it then? Looked like on the Internet, did not find the answer, washes not looking for it.

Answer 1

Not illegal if you are PCI DSS 3 certified