Examples on Social Engineering

In 3 to 4 paragraphs describe some of examples on Social Engineering, how they are used – which ones are successful –

Play the role of a hacker, what method would you choose if you were going to engage in Social Engineering?

https://www.youtube.com/watch?v=czdhBKDwKAk&list=PLzKnj7mTtdnnh8pCF7AZEGjcRKSIgZNOr&index=8&t=16s