Bitcoin (code: BTC or XBT) is a cryptocurrency where the creation and transfer of bitcoins is based on an open-source cryptographic protocol that is independent of any central authority. Bitcoins can be transferred through a computer or smartphone without an intermediate financial institution. The concept was introduced in a 2008 paper by a pseudonymous developer known only as "Satoshi Nakamoto", who called it a peer-to-peer, electronic cash system. *Wikipedia
Make sure to inform yourself as bitcoin is different than what you know and use everyday for currency.
What is Cryptocurrency Mining?
This video explains mining of Bitcoin but there are now hundreds of different currency’s and a few dozen different algorithms to mine crypto currencies with. Each currency may have the same or different algo.
This page shows what to mine but does not show where to mine. One of the easiest mining places is Nicehash.com. They have software that can take advantage of your CPU and GPU and mine the most equitable coin at the moment and convert it to Bitcoin so you get paid for your service.
There are hundreds of ‘pools’ and ‘services’ available for you to get started *note - minimum values are instilled in many places to control output.