That's a very generic question. The answer will depend on what you mean by that.
Possible things you might be trying to ask:
- What equipment do I need to buy if I want to mine on my own (not in a pool)?
- How do I set up and configure the equipment that is needed to mine on my own (not in a pool)?
- What maintenance do I need to perform and what do I need to monitor to be sure that I am maximizing my profits when I mine on my own (not in a pool)?
- What equipment do I need to buy if I want to mine as part of a mining pool?
- How do I set up and configure the equipment that is needed to mine as part of a mining pool?
- What maintenance do I need to perform and what do I need to monitor to be sure that I am maximizing my profits when I mine as part of a mining pool?
- What does the mining process actually do with regards to the transactions and blocks that are part of the bitcoin protocol?
- What is involved in the process of building a bitcoin block header?
- What is SHA256 and how is it calcualted?
- What is a Merkle Root, and how is it calculated?
- What is a nonce and how is it used?
- How is the target difficulty calculated?
- How accurate does the block timestamp need to be?
- What values are adjusted between each block SHA256 attempt?