MarkZuckerberg2016AP

Facebook says that 30 million accounts were compromised in a major hack — down from the 50 million accounts the social network had first estimated, but still not great news. 

Although Facebook took steps in light of the attack to protect users, the company has revealed that hackers had access to millions of people’s personal information.

For 14 million people, hackers could access an abundance of user data: name, email, phone number, hometown, current city, workplace, birthday, devices used to log into Facebook, the last 10 places they checked into or were tagged in, and their 15 most recent searches.

With so much sensitive data compromised, you may want to see if yours was taken — and take action to prevent it from ever happening again. 

Here’s how to check if whether your information was compromised, and how to delete your account: