Pulitzer made stories dramatic by adding blaring headlines, big pictures, and eye-catching graphics. His journalism took events out of their dry, institutional contexts and made them emotional rather than rational, immediate rather than considered, and sensational rather than informative. The press became a stage on which the actions of government were a series of dramas.

https://hbr.org/1995/05/why-the-news-is-not-the-truth

While wiki goes into great detail describing its origin and how it is awarded, The words "true or truth" are not found once

https://en.wikipedia.org/wiki/Pulitzer_Prize