system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why companies can copyright everyday words?

I mean,Apple,Windows,Candy (Candy Crush) those are words that everyone use daily so,how is it that someone just put it as a name to his company and can be the owner of that word for an enterprise sector?
gpt
Those aren't copyrights those are trademarks.  Trademarks are powerful, but extremely limited, forms of intellectual property.  Trademarks are used to differentiate products to prevent potential false advertisement of products in a similar category.  For example, Microsoft can't prevent people from making a company called "Joe's Windows Shop".  It can prevent someone from using the Windows logo, or for making a software product called "Windows Widget" if such a product gives consumers the idea that it's being sold by Microsoft.