Do you use your kids' names? Your pet's? Your favorite color? We all use some dumb passwords that are too easy to guess.
Worse, we use the same ones for lots of Web sites. So if one site gets compromised, or an employee there is dishonest, someone could start trying out that password on other sites where you have accounts, like Amazon or PayPal, and you've got trouble.
Summary: “KeePass is a free/open-source password manager or safe which helps you to manage your passwords in a secure way. You can put all your passwords in one database, which is locked with one master key or a key-disk. So you only have to remember one single master password or insert the key-disk to unlock the whole database. The databases are encrypted using the best and most secure encryption algorithms currently known (AES and Twofish).”