Cloud mining is renting hashrate from a company: you pay for a contract and receive a share of the mined coins without buying or maintaining hardware. Pros: no need for setup, cooling or electrical know-how; you can start with a small amount.
Cons: provider fees and margin eat into returns; contracts are often tied to price and difficulty at purchase. There are many scams: sites promise unrealistic returns and disappear with the money. Reputation, transparent terms and real reviews are critical.
Before buying a contract, recalculate payback including all fees and compare with buying your own ASIC at current prices.