Poloniex (pronounced "Poloniex", sometimes colloquially distorted to "Polyn") is a centralized cryptocurrency exchange that appeared in the early period of the digital-asset market's development. It became known for its wide range of trading pairs and support for many altcoins, which at one time made it one of the popular venues for active traders.

As a centralized exchange (CEX), Poloniex acts as an intermediary between buyers and sellers: users top up their accounts, place orders in the order book, and the exchange matches opposing trades and stores funds in its own wallets. In addition to spot trading, such platforms traditionally offer additional tools for experienced market participants.

What to pay attention to when using an exchange

• the conditions for depositing and withdrawing funds, trading fees;
• the set of available trading pairs and the liquidity of the order book;
• verification requirements and the availability of the service in your region;
• security measures and the reputation of the venue.

Since on a centralized exchange assets are stored on its side, it is important to follow basic security rules and not keep more funds in the trading account than is necessary for current operations.