What does one checkmark mean on a sent message in WhatsApp?

What does one checkmark mean on a sent message in WhatsApp - briefly?

A single checkmark on a sent message in WhatsApp indicates that the message has left your device but has not yet been delivered to the recipient's phone. It signifies that the message is currently in transit.

What does one checkmark mean on a sent message in WhatsApp - in detail?

A single checkmark appearing next to a sent message in WhatsApp indicates that the message has been delivered to the recipient's device. This means the message has successfully reached the intended receiver's phone, but there is no confirmation yet whether the recipient has viewed or read the message. The single checkmark is an important status update provided by WhatsApp to help users understand the current state of their messages. It serves as a crucial indicator that the message is no longer solely in the sender's domain and has made its way into the recipient's inbox, ready for viewing.