Text in Slide Master does not appear on every slide due to unique.

Cause:


When the title text on the Slide Master is changed, other slides are not updated with the same title because PowerPoint is designed for every slide to have a unique title. The Slide Master just provides the format (i.e., font, point size, and color) for each new slide title.

Solution:


Delete the title object from the 'Slide Master', and use the 'Text Tool' to create the desired title.

To get the title to appear on every slide: