What is the validity in Day or IOC orders in Zerodha Kite?

The validity type “Day” allows for keeping the order active until 3.30 p.m.(Market closing time). If the order does not get a match until the close of the market, gets auto-cancelled.

“IOC” order helps and allows you to execute the order instantly, as soon as it goes to the exchange. Failing the instant execution the order will automatically be canceled by the system.