KuCoin is a cryptocurrency exchange platform that has a well established reputation in the industry. I really like it's user friendly UI for both the web based and app platforms. I find KuCoin's mobile app far more intuitive than the Coinbase Pro app.
Another reason I like KuCoin is that it supports some of the less prestigious altcoins such as Electroneum and XYO.
KuCoin also offers a staking account they call "Pool-X" where you can hodl your coins and earn while your coins are staked. Pool - X currently supports 27 altcoins. Even if you aren't interested in taking big risks trading your coins on the exchange, Pool-X makes KuCoin a great place to hodl your altcoins.
Another reason I'm a fan of KuCoin is the KuCoinShares token (KCS). Utilizing KCS to pay your trading fees will give you a 20% discount. KuCoin gives you rewards for holding KCS. You have to have at least 6 KCS to qualify.
Whether you are new to cryptocurrency or have been in the market for a while now, you should definitely check out KuCoin if you haven't already.