Your security is increased enormously if you use a different complex password for all services on the Internet. You should save these in a password manager such as KeepassXC or Bitwarden.
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Remember that your password manager needs a particularly strong password. Also remember to make a regular backup copy of your password database. If you have trouble coming up with strong passwords, you can use the Diceware method. Below you will find a link with instructions. All you need is a dice.