Question about watch face (new user)

I can't find the answer in the manual - what's this red band along the left side of the watch face? It doesn't seem to be indicating either heart rate or step count (?)

it's your move bar. if you are being static for sometime it will add up, it goes away when you move. when it reachs the full level it will vibrate to remind you to move.

You've been 'stationary' for 1h45m. The bottom quarter indicates 1 hour and the 3 parts above are 15mins each. The bigger the bar, the more continuous steps needed to clear it. When it's nearly cleared it will start to flash.

You've been 'stationary' for 1h45m. The bottom quarter indicates 1 hour and the 3 parts above are 15mins each. The bigger the bar, the more continuous steps needed to clear it. When it's nearly cleared it will start to flash.

Thanks, I think it would have taken me a while to figure that out!