Ethereum (ETH) miners are currently voting to expand the block gas limit from 10,000,000 to 12,500,000 gas, according to a recent tweet from Bitfly, the parent company of Ethermine pool.
Gas is a unit that measures the amount of computational effort required to send a transaction or perform other actions on the Ethereum blockchain. It is denominated in Gwei, or extremely small fractions of ETH.