The display screens inside the subway, commonly referred to as "subway digital media", have unique advantages such as large passenger flow, mandatory viewing, and a closed environment.

A vast and stable large volume of passenger flow: The subway is the main artery for urban commuting, with an average daily passenger volume in the millions, covering the most mainstream consumer groups in the city (office workers, students, business people, etc.).

"Compulsory" viewing in a closed environment: When passengers are waiting at the platform or sitting in the train carriage, they are in a state of information "vacuum". The content displayed on the screens becomes the main visual focus, and their attention is highly concentrated, resulting in an extremely high advertising reach rate.

Precise positioning of spatial and temporal scenes:
Time: Peak hours (commuting), Midday (fragmented time), Weekends (leisure and entertainment).
Space: Business District Station (for high-end white-collar workers), Commercial Center Station (for shopping consumers), Transportation Hub Station (for tourists and business travelers), University Town Station (for young students).

A rich variety of media formats: from static posters to dynamic videos, and then to interactive screens, can meet the needs of different creative ideas and budgets.

Enhancing brand image and trust: Being able to conduct the advertisement placement within such a large-scale public facility as the subway is itself an indication of the brand's strength and credibility.