The production cost of banners is not high, but it belongs to the media that is more troublesome to maintain. Developers can't change banners every few days, and generally hope that banner advertisements can be guaranteed for several months. Such ad content with particularly strong timeliness is not suitable for banner advertising.

6. Limited by engineering nodes.

Banner ads can only be hung with the help of the external wall of the building, so they are limited by the progress of the project. Generally speaking, it is not suitable to hang banners from the floor to the fifth floor (15m). Similarly, for buildings with slipform, many banners should be set according to the slipform size and then raised and lowered.