For personal use: To know what services you use have been breached. You can then follow it up with ensuring you rotate the password on that site/service. If t

For personal use: To know what services you use have been breached. You can then follow it up with ensuring you rotate the password on that site/service. If they have other PII of yours, it's a heads up that scammers might target you and/or your family with that information. For work use: To monitor which sites/services employees use with work email addresses, and use it as a reminder/re-enforcement that they should rotate credentials used on that service, and if they're reusing them at work - to change there, too.