As medicines… Plantain has one very unique property, modern medicine has no equivalent. It can “draw out”. It’s not the only plant that can do this but it’s chief among the group. Say you have a spider bite or wasp sting or even a snake bite, it can draw out the venom. Say you have an abscessed tooth, it can draw out the infection, just chew it up like a wad of tobacco and hold it between your cheek and gum. It won't heal what caused the abscess but will buy you a few days until you can get to a dentist. It can also draw out the infection from a shallow infected cut.
Its other greatest attribute is its ability to heal our skin. It causes a cut or abrasion to heal much faster than normal. It will even cause a very serious wound or cut to seal quickly. There is a danger here… it can close a wound so quickly that infection can be trapped deep inside. If I needed to treat a deep cut or wound there are several plants I would use. Plantain is on the list but only after I was sure there was no deep infection. Plantain it great for any sore in the mouth or ulcer or boil.
There are dozens of other uses for Plantain but I’m going to skip those… The herb books I’ve posted in the library go into these in great detail.