Added password manager description

README.md

@@ -1447,6 +1447,8 @@ _Related: [Wikis](#wikis)_
 
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+A [password manager](https://en.wikipedia.org/wiki/Password_manager) allows users to store, generate, and manage their passwords for local applications and online services.
+
 - [Bitwarden](https://bitwarden.com/) `⚠` - Password manager with webapp, browser extension, and mobile app. ([Source Code](https://github.com/bitwarden/server)) `AGPL-3.0` `C#`
 - [keeweb](https://keeweb.info/) - This webapp is a browser and desktop password manager compatible with KeePass databases. ([Source Code](https://github.com/keeweb/keeweb)) `MIT` `HTML5`
 - [Padloc](https://padloc.app/) - A modern, open source password manager for individuals and teams. ([Source Code](https://github.com/padloc/padloc)) `GPL-3.0` `Nodejs`