What are some ways in which a hacker can social engineer?

There are many techniques by which a hacker can trick someone.
These include:

• Phishing
• Identity Spoofing (Pretexting) that can lead to Identity Theft
• Watering Hole Attack
• Piggybacking (Tailgating)

I will go over – phishing, identity spoofing, watering hole attack and piggybacking – the social engineering techniques in other videos.