Digital Marketing—Concepts · Tools · Applications is a 16-chapter textbook built on a single principle: concepts before platforms. Opening chapters settle the digital consumer, customer journey, and strategy; execution then runs channel by channel—content, SEO, SEM, social, e-mail, mobile, affiliate, and programmatic—closing on analytics, data privacy, and ethics. Aligned to Indian university curricula and the Delhi University syllabus, it is written from the Indian market outward—UPI, quick commerce, hyperlocal search, the DPDP Act 2023—and runs current to mid-2026 on generative and agentic AI, AI-driven search and cookie-less advertising. The teaching apparatus includes 64 Brand Spotlights, 17 case studies, 141 figures, 152 discussion questions and 97 MCQs with printed answer keys, in a chapter template that repeats identically sixteen times. The result works equally as a self-study text, a lecture companion and a semester's worth of ready-made assessment.