Summary:
Your brake lights are there not just for aesthetic purposes. They serve as a signal for other motorists on what you are doing. These brake lights also send out information to other drivers that you are slowing down or are doing to stop your vehicle.
When your brake light seems to be always on, then you might want to check it. You see, your car's brake light may be stuck. You should first check the brake pedal switch. If you do not know where to find this, it is actually that small button that you can find behind the brake pedal. When you press the brake pedal down, this button is actually activated and makes your brake lights go on. Try checking the switch manually. If this seems to be the problem, then you can try giving it more force for it to become unstuck and solve the brake light problem.
Or you can check other parts of your brake system to see which one might be the culprit for your car's eternally on brake light. You can check the fuse of the brake light and see if there are any damages to it. Also check the light bulbs of the brake light itself. If you simply are stumped, you can bring your car to your trusted mechanic so he himself can diagnose the problem for you. And when he does, he also could expertly find the solution so as to get rid of your brake light problem.
So why is it important to fix your car's brake light problem? Well, according to automobile experts, when you drive around in a car that has brake lights that do not work perfectly, you are increasing your chances of being in an accident or even of being the cause of other motorists' accidents. That certainly would not be something you would not like to be caught in the middle of.
Your brake lights are there not just for aesthetic purposes. They serve as a signal for other motorists on what you are doing. These brake lights also send out information to other drivers that you are slowing down or are doing to stop your vehicle.