Ether is the native currency of the Ethereum blockchain. Please check out this article from the Ethereum Foundation that gives a better dive into the currency/technology. Ether is just behind bitcoin in terms of value but is quickly rising and is the go-to currency for decentralized finance. Ethereum is the name of the network that mines for Ether and is the backbone of NFT's or Non Fungible Tokens. Serious crypto collectors and participants use Eth to transact NFT's for a myriad of reasons.
In order to transact Eth you will need a wallet. A crypto wallet acts like a normal wallet that stores your cryptocurrency. In order to fund your crypto wallet, we recommend purchasing ETH through an exchange such as Kraken or Coinbase and then transferring your Eth into a MetaMask (or other crypto wallet) that is linked to the site.