A password manager can help with the difficulty of having to remember passwords of varying complexity or length for different services. Here, only one master password needs to be remembered, which protects all other passwords.
However, its use does not only offer advantages. If one forgets the master password and does not (or no longer) know the passwords stored in the password manager, one has no access to the services protected with it. If an attacker gets hold of the master password, all managed services are compromised, unless they use multi-factor authentication.
Further details can be found on the following BSI website: Link or in the Security Awareness Course.
The SCC recommends KeePassXC. This program can be made available on centrally administered systems (ZDM computers) upon request. KeePassXC allows you to store passwords for web services and programs installed on the system.