According to National PTA 52% of the USA citizens agree with having advertisements at school since roughly 88% of the population do not pay attention to the advertisements showcasted around them, therefore they believe that using the school ground as a platform for advertisements is actually a smart move as these companies provide funds that schools desesperately need.
On the bright side, there are many advertisements that are actually helpful for students such as PSAs or adds about healthy food.
Hope this helps!!