What is the bar on top of the running tile good for?

[Windows Central Question]

When I was using the running tile to map my exercise I noticed some kind of bar on top of the screen. I mean the screen that displays distance, duration and pace. Does anyone know what it shows? GPS signal strength maybe?

 

[Chintan Gohel]

When I was using the running tile to map my exercise I noticed some kind of bar on top of the screen. I mean the screen that displays distance, duration and pace. Does anyone know what it shows? GPS signal strength maybe?

Could you upload a screenshot?