First of all, the school's advertising wall helps students release information for free. As far as helping students publish information for free, it attracts students who don't study to stop and read information here, while those who need to publish students often pay attention to what they publish here. Slowly attract these students to drain, and this wall will generate a lot of traffic. With the traffic here, businesses also want to use this traffic to do some advertising.

There are more people in the school, so there are more students who leave messages or communicate on this advertisement wall. If merchants see the number of people with this traffic, they will use this advertising wall to advertise. For example, some sticker advertisements, or some company billboard advertisements, or some advertisements for consumers to join, and so on. Then when doing these advertisements, the university will charge a certain advertising fee, and this advertising fee may be broadcast in rotation and there is a time limit, so there will be a certain profit in the long run.

But in general, the traffic generated by the school's advertising wall is limited after all, because only a part of the students post information and watch here, and their own walls are just a little bigger. Even if the information is updated, it can't reach a certain enough flow, so this advertisement wall says that he can't make much money because his own limitations are already here.

In addition, the spread and speed of online letters will make students more willing to choose the network. Many schools have their own school forums or social platforms. Then there will be many channels for social platforms to publish information on the network, and there is no need to publish it on this advertisement wall. Online confession is also very popular now.