There's nothing quite like the satisfaction of knowing that your message has been delivered and read. Fortunately, many messaging apps offer a handy solution: read receipts. This way, you not only know if your messages have been delivered, but others can also see that you've read their messages.  However, not everyone is a fan of reading receipts. Some find it intrusive and a violation of their privacy, while others find it a useful feature. That's why read receipts are optional and can be set up per app.