Shorting (Short sale, Short selling)

Holding a short position in finance means investing in a way that investors can benefit from a decline in the value of the asset, contrary to the traditional long position.
Short selling is not holding stock, but selling stock.
It's a way to sell stocks that you don't have in advance and buy them if they fall.
In other words, it's the process of 'buying cheap after selling expensive' rather than what we usually think of as 'selling expensive after buying cheap'.

If you want to study more, please visit Almost Everything of Short Selling