Social media hacks often occur due to weak passwords, phishing attacks, or security vulnerabilities in social media platforms. To protect yourself from social media hack, it's crucial to use strong, unique passwords for each of your accounts, enable two-factor authentication where available, and be cautious about clicking on suspicious links or downloading attachments from unknown sources. Regularly updating your passwords and being mindful of the permissions you grant to apps and services can also enhance your security on social media platforms.