"Plot advancement" refers to the progress or development of a story. It involves moving the events or actions forward in order to reveal new information, create suspense, or reach a resolution. Full definition
All the high tech eye candy is cool, but it doesn't make up for the lack of plot advancement. (parentpreviews.com)
While this part of the film may seem small and unimportant in the grand scheme of the Marvel Cinematic Universe, getting to know characters better who may be around for multiple films seems just as important as plot advancement. (businessinsider.com)
The result is lots of noise and the pretense of progress, but not much plot advancement or character development. (parentpreviews.com)