Coinbase is a digital crypto currency exchange headquartered in San Francisco, California. They broker exchanges of Bitcoin & Altcoins with fiat currencies in approximately 32 countries, and bitcoin transactions and storage in 190 countries worldwide.
Coinbase is Renowned as one of the top user friendly sites; which makes it one of the favourites starting point for those new to the crypto scene. You can buy, sell and transfer some of the top coins to other exchanges such as Kraken, Poloniex, KuCoin, Bittrex, Binance, Bitfinex, Cex.io from Coinbase or Coinbase Pro. Coinbase is selective in the coins it deals with and currently have Bitcoin, (BTC), Litecoin (LTC), Ethereum (ETH), Zcash (ZEC), Dash (DASH), Ripple (XRP), Monero (XMR), Bitcoin Cash (BCH), NEO (NEO), EOS (EOS), Stellar Lumens (XLM), Tether (USDT), Cardano (ADA), Chainlink (LINK), 0x ZRX, Dai DAI, at time of writing. They continue to expand their coin dealing.