people use soap to clean themselves, plus hundreds of industrial uses
poele invented soap beause they neeed to be clean
People could use soap to wash themselves and other things.
Some people made home-made lye soap, but soap was also available in the stores if you could afford it.
Biolage
Yes.
Use soap and water.
Soap and bleach are common in laundries.
To make people smell nice.
People use whale blubber for candles, soap, food, clothing and much more.
It makes people less stinky when they use it regularly.
Yes, lye soap is safe to use in fact that is what I use every day. When I was a child, my father used to make lye soap which we all used regularly. Except that it didn't have perfume, it was no different from 'store bought' soap. In previous centuries, many people made and used lye soap.
Ash. The ash from wood fires is a reasonable thing to use instead of soap. the leaves from some plants are also useful.
liquid soap is better because who wants to use someone old nasty bar soap with all of that sick sweat for other people not me