Summarize this article in one sentence.
Go to the login page for the account that you suspect was hacked and attempt to log in with your email address/username/phone number and password. If your account password won't work and you didn't change your password, look for a password reset email from the account. You can usually reset your password and secure your account from such an email. Unfortunately, if you can't log into your account and your email address isn't accessible, the only thing that you can do is report the account as hacked to the company or service to which the account belongs. Irregular activity may include anything from messages or posts that you didn't create to radically different account settings. On social media, you may also find that you're following different accounts or that your bio has changed. On platforms like Facebook, a common hacking method involves a friend "sending" a link to you; if you click the link, it will be forwarded from your messenger to other friends or contacts on the platform. If you see people responding to you even though you didn't send a message, you may have been hacked. Avoid clicking links from anyone you don't trust, and verify the contents of links with people you do trust before opening the links. This website hosts a list of sites which have had their information stolen over recent years. Go to https://haveibeenpwned.com/PwnedWebsites and scroll through the list of websites there; if you see a website on which you have an account, look at the details of the hack. If the hack took place well-before you created your account, you're probably fine. If the hack took place any time after you created your account, change your password for the website and any connected services (e.g., your email address) immediately. A staggeringly large number of high-profile websites such as Sony and Comcast are on the "Have I Been Pwned" list, so the chances that you have at least one potentially compromised account are high. To both avoid getting hacked in the future and minimize the damage if you do get hacked, consider doing the following: Enable 2-factor authentication (which verifies that you're logging into your account by sending a text message to your phone) on any available platforms. Never use the same password twice (e.g., use a different password for each of your accounts). Change your password immediately if you ever accidentally leave your account logged in on a shared computer, smartphone, or tablet.
Attempt to log into your account. Look for irregular activity on your account. Pay attention to any recent messages. Check the "Have I Been Pwned" website. Prevent future complications.