First, if you know you've reused a password on one of the services listed, then you know to go change that password everywhere. Everyone should be using unique

First, if you know you've reused a password on one of the services listed, then you know to go change that password everywhere. Everyone should be using unique passwords and a password manager, but some of these breaches are so old they're before that was a commonly-used practice. Second, you can look into each incident to see what exactly was breached -- personal information, payment info, and so on. It's good information to know.