Ethereum is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of fraud or third party interference.
In the Ethereum protocol and blockchain there is a price for each operation. The general ledger records all the transactions in a public history called a blockchain, which verifies the order and integrity of the data.
The decentralized character of Ethereum makes it difficult to shut down or alter by any single entity. This makes it attractive for many companies and organizations that are looking for censorship-resistant platforms.
There are definitely companies that mine Ethereum. Ethereum’s proof-of-work algorithm is called Ethash, which is a memory-hard algorithm.
This means that in order to be profitable, miners need to have access to a lot of memory. This has led to the development of specialized mining equipment that is designed specifically for Ethereum mining.
Ethereum is still in its early stages and is not yet as widely adopted as other cryptocurrencies. However, there are definitely companies that are mining Ethereum and there will likely be even more as Ethereum continues to grow in popularity.