Online cryptocurrency exchanges are websites where you can buy, sell or exchange cryptocurrencies for another digital currency or fiat money (USD, EUR etc)
Two of the most popular exchanges are Bittrex.com and Poloniex.com
I personally prefer Bittrex but both are very popular.
If you are just looking to buy Bitcoin you can also use a service like Coinbase.com if it is allowed where you live.
Thank you, I'm gathering info for my next article and no I'm a full spectrum gambler so no bitcoin won't be the only topic!
@peerplays