Digital advertising has fundamentally transformed the commercial landscape, moving from a world of billboards and television spots to a complex, data-driven ecosystem where every impression, click, and conversion can be meticulously tracked and optimized in real-time. At its core, digital advertising encompasses all forms of promotional content delivered through digital channels, including search engines like Google, social media platforms such as Facebook and Instagram, display networks, video streaming services, and even podcasts. The most significant distinction between digital and traditional advertising lies in the unprecedented level of targeting capability available to modern marketers, allowing them to reach specific demographics based on location, browsing history, income level, viral marketing interests, and even recent purchasing behavior.