Most schools have things that they are proud of. They may be proud of their football team, or their basketball team, or even their course profiles. Moreover, they don't want those things to die out because the members all graduated. What they do is they advertise those things. They make sure that those organizations or those courses aren't forgotten. Most of the time, they are even improved.

The most common thing for a school to do when they want to advertise something would be the use of street banners to cover ground with. This is because they know that streets are heavily frequented areas. They also use them because they can cram so much information into them without rendering them useless. These banners also capture the attention of people who pass by since they really stand out in the bleak urban landscape.

Some schools also advertise the fraternities and sororities that exist within their superstructure. This means that they have to use something like college flags to get the job done. This is because using those kinds of banners is something that will be unique only to the campus of the school that would use them. After all, the students are the ones who are going to be drawn in. This exclusive activity allows them to have an edge over the other schools since they are able to give their students something to think about. This also serves as an attempt to beautify the campus since those organizations have different colors and sigils. This ensures that the landscape within campus isn't boring.