Having a bad password, like "123password", is like leaving the key to your house under the mat outside your door. It's obvious. You're practically inviting people to come and steal your things. Though having an easy "123" password (or maybe a password that's the name of your adorable dog) makes it easy to remember, it also leaves you extremely vulnerable. In this "house" scenario, imagine that each home's street address represents a website, like www.apple.com, www.gmail.com, or www.chase.com. To get into all of the real houses, the thief would have to travel to each house, find the key, break in, then do the same thing for each home. Not easy, and very time consuming. But to break into all of the digital houses (websites), in many cases the thief only needs to get into a single house. If they gain access, they can use sophisticated software programs to instantly open the doors to the other houses. Just a couple of clicks on their computer and they suddenly have access to all of those houses... to your websites... and eventually, to your entire digital life.