What is the number inside the green rectangle to the left of the station label?
The number in the green rectangle to the left of the station location name is the PlugScore. A station's PlugScore reflects the experience of its most recent users. When a PlugSharer reports a negative experience at a station, its score drops. When a PlugSharer reports a positive experience, the station's score rises. If a driver just wants to check-in and leave a neutral comment, the PlugScore will not be affected.
Remember to check in when you charge up to keep the community updated and raise the station's score!