Washing hands with soap is a good practice to keep germs away.
As we touch various objects, germs get accumulated on our hands. These germs could cause harmful diseases. Inorder to keep ourselves safe and healthy, it is best to wash our hands with soap or running water to remove these germs.
Fun fact: A doorknob can contain millions of germs and are a hotspot for bacteria. It has quite a lot of germs compared to other places in a house.