Digital advertising is the foundation of modern marketing strategies because it allows businesses to effectively reach and influence their potential customers through various online platforms. 

Businesses can increase brand awareness and customer loyalty by combining various types of digital ads, such as display banners, video commercials, and pay-per-click (PPC) campaigns. 

Furthermore, by precisely targeting audiences based on their demographic, behavioral, and psychographic profiles, this strategy optimizes the conversion rate as well as the return on investment (ROI) of marketing efforts. 

Digital advertising also enables businesses to promote their products and services in a more efficient and flexible manner, as they can adapt their strategy in real time and measure their performance across multiple digital channels using various metrics and analytics tools.