Definition
Password Manager
A tool that generates and stores strong, unique passwords so you never reuse or memorise them.
A password manager creates long random passwords for every account and stores them in an encrypted vault unlocked by one strong master secret. Good ones are zero-knowledge, so the vendor cannot read your vault.
Why it matters: password reuse is the single most misuseed habit online — one data incident cascades into many. A manager makes unique passwords effortless and is the highest-leverage security upgrade most people can make.