ive heard about filesharing and some subpoena stuff about isp? what is subpoena? what is Isp?

Answer 1

An ISP is an "internet service provider", this means the company that provides internet service to customers. A subpeona is a court document, in this case it would be requiring the ISP to release information about customers internet usage to determine who is doing illegal filesharing, so they can check it out further in regards to legal issues.