If information flows from the media to the opinion leaders and from them to the target audience, the process is known as

When information flows from the media to the opinion leaders and from them to the target audience, the process is the two-step-flow.

One-step-flow would mean media reaching the audience directly in a single move, which skips the opinion leaders that define this model.

Step-by-step flow is a vague phrase, not the established name for this two-stage relay through opinion leaders.

Multi-step flow describes many relay points and multi-directional influence, a more elaborate pattern than the simple two stages here.

Opinion leaders receive media content first, then pass their interpretation to others.

This model came from Lazarsfeld's study of how voters were influenced.