If you spend any time on the Internet (and who doesn’t these days?), then you probably have a lot of passwords.
You need a password every time you log on to your social media accounts, check your banking account balance or order something from Amazon.
If you belong to any forums, run a website or even just write a blog, then you have even more passwords.
It’s tempting to use the same password for each of these websites. After all, you probably need to sign in to dozens, if not hundreds, of websites during the course of a normal year. If you had a strong, unique password for each of these websites, how could you possibly remember them all?