A company loses its customers' data — not something you did. The damage spreads only if you used that same password elsewhere, which is the one thing to go and fix.
The drawing that proves the sentence above. It is the same card that is in the book.
Think of it as
the hotel's guest register left on the street.
For example
A shop you bought socks from four years ago loses its customer list. Nothing you did was wrong — but if you used that password elsewhere, go and change it.
This is one card out of 275.
The hundred words you meet most are free — the whole set, animated, in one file that works with no internet.
Volume 1 has all 275 in fifteen chapters, with Staying Safe the largest chapter on purpose.