Identity theft is a growing threat, particularly on social media platforms, costing millions to victims. Types of online identity theft include account takeover, card fraud, and more. Signs of theft include strange transactions and unrecognized accounts. Protecting yourself involves checking financial statements, monitoring credit reports, and using data leak tools. If your identity is stolen, report it, change account details, and consider a credit freeze. Prevention includes strong passwords, cautious information sharing, and regular credit monitoring.