From the Final Draft blog…

A scene becomes filler when:

• It doesn’t move the plot forward
• It doesn’t reveal anything new about the character
• It doesn’t increase the stakes or tension
• It doesn’t evolve the conflict characters are facing
• It repeats information the reader or audience already knows

Read the article at:
https://www.finaldraft.com/blog/how-to-avoid-filler-scenes-in-your-screenplay