Copyright vs Copyleft

Copyright

If a company has copyright on a specific product this means that other people can't use that product because they could possibly make money off of a product that isn't even theirs, and if they do they could possibly get charged and get a prison sentence.

Copyleft

Copyleft means that people can use copyright products only if they have permission from the owners to use and are only allowed to use products if it helps the owners make more profit. Copyleft also means people can freely distribute a product and even distribute modified/edited versions under regulations.