Short explanations of the terms you see on Vertexhash.
The computing power used to mine coins. More hash power means more attempts per second to find a block, so a larger share of the network's work. On Vertexhash you rent hash power instead of buying machines.
How much hash power a miner or the whole network has, counted in hashes per second. It is usually written as TH/s (terahashes per second) or EH/s (exahashes per second).
A number a coin's network adjusts regularly to keep blocks coming at a steady pace. When difficulty goes up, the same hash power mines fewer coins. When it goes down, the same hash power mines more.
Cloud mining is not a guaranteed income. What your hash power mines changes with coin prices and the network difficulty, and you can lose money. Only use funds you can afford to lose.