Effective

A company launches a new advertising campaign. They try several approaches: social media ads, billboards, email newsletters, and television commercials. At the end of the month, they measure which method brought the most new customers. One method – a short video shared on social media – doubled their sales. The other methods had little impact. This method did exactly what it was supposed to do: it worked. What kind of method is the social media video? It is an effective method.

Conducive means creating a helpful environment or background that makes an outcome easier or more likely, but not directly causing it. Effective, by contrast, means successfully achieving the intended result, directly producing the outcome. Conducive focuses on setting the stage. Effective focuses on getting the job done.