what is spread in forex trade ?

Spread is a trading fee which you dont see stated in your trading account statement because the prices of the instruments you trade have been inflated by the broker

spread is simply the difference between the bid (sell) price and the ask (buy) price of a currency pair.

It's basically the broker's main fee, tighter spreads = lower cost for you. Always check it before trading.

Spread is like a gate fee, you must pay it before you enter the market