This form is called a binary or executable. The form that a human can read is called source code. It is what a human programmer creates, and is translated by another computer program into the binary or executable form. The next right, the right to modify, is the right to fix a problem or enhance a program. For most people, this means your right or your organization's right to hire someone to do the job for you, in much the same way you hire an auto mechanic to fix your car or a carpenter to extend your home.
Modification is helpful.
Application developers cannot think of all the ways others will use their software. Developers cannot foresee the new burdens that will be put on their code. They cannot anticipate all the local conditions, whether someone in Malaysia will use a program first written in Finland. Finally, of these legal rights, comes the right to redistribute. This means that you, who own a computer, a software factory, have the right to make copies of a program and redistribute it.