Stock market volumes indicate the number of shares bought and sold over time or during a trading day. For example, the more active the shares, the higher are the volumes.
You can analyse the trends and patterns in the stock market through volumes. Shares that are actively traded have high volumes, and those which are not actively traded have low volumes.
Stock exchanges publish trading volumes for every trading session as the total volume of all stocks that are traded on the stock exchange. Interest in this share is high if there are enormous volumes for a particular share.