QR Code में सिर्फ 3 Boxes क्यों होते हैं चौथा कहाँ गया 🤔

Why Do QR Codes Only Have 3 Squares? From local shops to metro stations, QR codes are everywhere. But have you ever noticed that they only have three square boxes in the corners, leaving the fourth one completely empty? In today's video, we decode the fascinating technology behind QR codes! Learn