All Forex quotes have prices: the bid and ask.
The bid is the price at which your broker is willing to buy the base currency in exchange for the quote currency. This means the bid is the best available price at which you (the trader) will sell to the market.
The ask is the price at which your broker will sell the base currency in exchange for the quote currency. This means the ask price is the best available price at which you will buy from the market. Another word for ask is the offer price.
The difference between the bid and the ask price is whats called the spread.
On the EUR/USD quote above, the bid price is 1.34568 and the ask price is 1.34588.
If you want to sell EUR, you click “Sell” and you will sell euros at 1.34568. If you want to buy EUR, you click “Buy” and you will buy euros at 1.34588.