That is your battery warning light and it should be a picture of a batter and it should be red. This sign is an indication that the battery in your car is having an issue, and may not be charging anymore.
If you spot this while driving, the first thing to do is to turn off all electrical components in your car. This includes the air conditioning, heating, stereo, interior lighting, seat heaters/coolers. Don't switch off the headlights if you are driving at night, but if you are driving during the day turn off the day time running lights.
If at all possible stop by and we will help you resolve this issue before it causes more trouble.