Social engineering relies on human interaction and manipulation to gain access or information through psychological attacks. It works by exploiting human weaknesses like insecurity, authority, urgency or familiarity. There are physical techniques like impersonation or tailgating and digital methods like phishing emails, spam, hoaxes or hijacking common website misspellings to trick users into giving away access or sensitive information. Social engineering is an ongoing tactic that requires constant vigilance against evolving methods of deception targeting human vulnerabilities.