Why is there one checkmark in WhatsApp, what does it mean?

Why is there one checkmark in WhatsApp, what does it mean - briefly?

The single checkmark in WhatsApp indicates that your message has been sent from your device but not yet delivered to the recipient's phone. It signifies the initial stage of message transmission.

Why is there one checkmark in WhatsApp, what does it mean - in detail?

The single checkmark in WhatsApp serves as a fundamental indicator of message delivery status. When a user sends a message and sees only one gray checkmark next to it, this signifies that the message has left the sender's device and is currently in transit to the recipient's device. It does not confirm receipt or read status; rather, it merely indicates that WhatsApp has successfully sent the message to the intended recipient’s phone. This initial checkmark provides users with a basic assurance that their communication attempt is underway, albeit not yet completed.