In the trading world, BID refers to the highest price a buyer is willing to pay for an asset at a given moment.
When you see the BID in an order book, you are viewing the 'best buy offer' available.
That is, if you want to sell immediately, you would accept the BID price.
Important:
BID = Price at which buyers want to buy.
ASK = Price at which sellers want to sell.
The difference between the BID and the ASK is called spread, and analyzing it can open strategic opportunities in the market.
Remember: The BID shows buying pressure, and understanding it is key to reading market depth.