You probably went to nasdaq.com which is NASDAQ's site for retail and web-search landing. They have information there and monetize it with advertising like man

You probably went to nasdaq.com which is NASDAQ's site for retail and web-search landing. They have information there and monetize it with advertising like many other sites do. As others have noted, they are a broad business and it is a revenue stream. You can go to https://nasdaqtrader.com https://nasdaqtrader.com if you want to read the exchange's specifications, symbol lookup, system status, etc.