In his Ted Talk, Daniel Engber, (award winning journalist for the New York Times, Slate & Wired)
, explains that:
"When you see a progress bar, it sort of locks your attention in a tractor beam. The progress bar gives you the vision of a beginning and an end and you're working towards your goal."
Neil Patel says,
"People want progress bars. But why are they so powerful and effective for engagement? It's because as people, we are driven to:
1. Have goals; and then
2. Accomplish them"