Complex sentence: This bar uses motion or some other indicator to show that progress is taking place, rather than using the size of the filled portion to show the total amount of progress, making it more like a throbber than a progress bar.
Split into simpler sentences: This bar uses motion or some other indicator to show that progress is taking place, rather than using the size of the filled portion to show the total amount of progress. This makes it more like a throbber than a progress bar.