Solder: What is it, Why is it good, and Where is it Found?

-This is can Alloy of Lead and Tin [Usually] -This doesn't have a Melting Point that is Definite- it just Gradually Solidifies as it Cools Down. This makes it Easier to Join Metal Things together. -It can be used in Components, and its Low Melting Point will mean it won't deform Other Components