⦁when creating a strong password, what are some valid criteria the password should meet?

Your password should never contain personal information that somebody can guess. The most secure passwords contain; uppercase letters, lowercase letters, numbers, and symbols in some sort of variation.
A lot of times using numbers in place of letters like using a 5 in place an S, a 3 in place of an E, a 0 in place of an O, or a 1 in place of an L or I, will increase the strength of a password.
A good example could be using "Cha1rL3g$"

Hope this helped or was helpful information!