Why is it said that advertising 3D printers will end an era? What are the advantages compared to the traditional way of making advertisements?

Large-size led letter 3d printer. The common Large led letter 3d printer in the market are mostly 400mm-600mm molding scale, and the manufacture of luminous characters requires a larger molding scale. In order to satisfy the market’s demand for large led letter 3d printers, we have developed a large-scale workbench luminous for the word 3d font printer.