Trading pairs are combinations of two different cryptocurrencies or a crypto and a fiat currency that can be traded against each other on an exchange. Here are a few examples of common trading pairs:

1. *Crypto-to-Crypto Pairs*:

- *BTC/ETH*: Trade Bitcoin for Ethereum and vice versa.

- *BNB/USDT*: Trade Binance Coin for Tether (a stablecoin).

2. *Crypto-to-Fiat Pairs*:

- *BTC/USD*: Trade Bitcoin for US dollars.

- *ETH/EUR*: Trade Ethereum for euros.

3. *Stablecoin Pairs*:

- *USDT/USDC*: Trade between two stablecoins pegged to the US dollar.

Trading pairs are essential because they determine what you can exchange one asset for. To buy a coin, you need to find a pair that includes the coin you have and the coin you want. Let me know if you want the current top trading pairs or those on a specific exchange.