A mining farm is when a group of miners mine together for a variety of advantageous reasons, like energy use.
One of the most popular ways through which many people get cryptocurrencies is through the process of mining them. More specifically, we'll use Bitcoin as an example, as miners earn 6.25 Bitcoins each time they complete a block at the current point in time (May 2021).
Discussing a mining farm, this is typically a room or a warehouse that is dedicated to mining cryptocurrencies. Keep in mind that the farm can be a basement in a house with multiple ASIC machines, or even a large warehouse that features both GPUs alongside ASICs. Mining farms contain truly enormous power supplies, alongside huge fans to cool the equipment. They typically have more than a single person working on them. A mining farm is essentially a mining pool with miners that are housed within a single location and building.
Bitcoin mining is a simple concept: it is the process of someone verifying a transaction so that it can be added to the public ledger we all know as the blockchain. Transactions are added in blocks, and all you need to verify a Bitcoin transaction is a computer with a connection to the internet and a software program that is linked to the blockchain.
Keep in mind that computers consume a lot of energy, and air conditioning is typically required to prevent any overheating. This means that if you are in a geographical location known for its low temperature, you might just be in luck in this regard.
Mining is expensive, and in addition to using large amounts of electricity, the mining computers need to be replaced frequently. As such, you will be required to have some capital upfront in order to start with your mining farm, and expand and maintain it through the currencies you end up generating.