Copyright is taking someone's idea(tech ideas) and taking it as your own.For example if someone is creating a software and sells it in a shop.If someone buys it and copys millions of copys and sells it cheaply that is copyright.It is wrong to infringe peoples work cause they work hard to create this software.If you to use other people's creation you have to first ask for their permission.If you do not ask permission you will end up behind bars.To make sure you don't infringe other people's work,create your own work.