Settlement Date is the date on which a financial transaction is completed, meaning the buyer pays for the asset and the seller delivers it.
The Settlement Date is when the actual exchange of securities and money happens after a trade is executed (trade date).
In stock markets, settlement follows a T+1 cycle (Trade Day + 1 working day) in India. This system is implemented by exchanges like the National Stock Exchange and Bombay Stock Exchange under regulation of the Securities and Exchange Board of India.
"If you buy shares on Monday (T), they are credited to your account on Tuesday (T+1)—this is the settlement date."