We will learn about cyber security, ethics & cyber crime in details on the basis of real world examples. Now a days, cyber security is must to know for handling social media platforms securely. Students should he well versed with the rules and policies of cyber world. In this chapter we will discuss about phishing, scam, online fraud, fake rewards claims. Students should be aware about cyber ethics to follow the safe guidelines for using social media. In today's generation, social media platforms are at their peak time, everyone want to create own identity to gain popularity and as a earning sources so it is must to not be trapped in scams and fraud advertisement. By the end of this chapter, we will understand all rules and regulations for using cyber services safely and securely. This chapter is included in your syllabus to introduce about cyber crimes and protocols over the internet.