Rangdom guides
Password entropy guide
How password length and character choices affect the amount of guessing resistance a generated password has.
Entropy in plain terms
Password entropy estimates how many possibilities an attacker would need to search. Longer passwords and larger character sets increase the search space much faster than small visual changes.
Length usually wins
Adding several characters often improves strength more than adding one more symbol type. A long generated password or passphrase is usually easier to reason about than a short complex password.
Unique passwords matter
A strong password should be unique for each account. Reusing one generated password across sites can make unrelated accounts vulnerable if one service is compromised.