Image processing is quite a headache in development environments as well. Processing and handling images with code on the server or app side is quite troublesome. When image size issues are added on top of that, handling just that alone could take several days or more in the worst case. This lecture is not a technical lecture covering code-based processing, but it will help reduce the trial and error that can occur during development. This lecture does not cover technical content about image processing. It's more like a methodology for planning image sizes. This means the target audience is web designers or planners rather than developers. It's not a difficult or heavy lecture. It's fine to listen to it lightly during commuting hours. It's worth saving a cup or two of coffee. If it can reduce the cost of fighting between planning and development perspectives, it might even be considered more profitable.