Need help creating pop up box that displays information from box to table

Sorry about that. I didn't plan on adding things after the fact, but as I'm actually getting to use the code, I'm seeing these other things that I wanted it to do. I'll try to be more clear in the future. Is there any way that you can explain to me what the code does? I've only done self-teaching with VBA and macros in excel, and I'm just trying to understand how the code works. I appreciate any support you can give. Thanks again for the help!