SamInfratech is a telecom and software company with headquarters in Delhi and 250+ employees. As an intern, responsibilities included digital marketing tasks like SEO, pay-per-click ads, and email campaigns. Digital marketing was defined as using online activities to generate sales through customer relationships. Key components included websites, SEO, PPC, social media, display ads, and email. SEO involves getting natural search engine rankings, while PPC means advertisers pay only for clicks. The presentation concluded internships provide real-world experience implementing classroom concepts in a work environment.