Alert is too generic

I received an alert that "This email is from the LifeLock Member Services Team. We detected your personal information being used in our network†. DATE: 07/23/2017 11:18 AM ALERT TYPE: Existing Account Update CATEGORY: Bank Account Checking/Savings COMPANY: JP Morgan Chase If you initiated the activity, click "YES, this was me" below. We'll send you an email confirmation. If you DID NOT initiate the activity, click "NO, this was not me" below. We'll review the situation and let you know what we find via phone or email." I could not figure out what "Personal information" meant, how it was accessed, what the activity was, or when it took place. I went online to look at my accounts, but didn't see anything awry. It would have been helpful to know what the heck you were talking about. Next time give me a hint.