Digital Marketing is the use of online channels, platforms, content, advertising, websites, and measurement systems to attract, engage, convert, and retain customers.
It matters because strategy keeps channels from competing with each other. When this concept is clearly defined, the team can connect budget, audience, creative, offer, tracking, and reporting to revenue instead of chasing disconnected metrics.
Example
A service business can combine a useful website, search visibility, paid campaigns and follow-up email around the same inquiry process. Each channel has a defined role, and measurement connects activity to inquiries and completed sales.