There are in total of 3 types of WhatsApp ticks. If you see a single grey WhatsApp tick, then that would mean that your message has been successfully sent to the other user, but he or she has not yet received it. Now, instead of the single tick, if you see two grey WhatsApp ticks on your message, then that indicates that the message you had sent, has been received by the other user or contact. And finally, if you were to see that those 2 grey WhatsApp ticks have turned from grey to blue in color, then that clearly tells you that the other user has read the message you had sent. The way you can figure out what time was the message sent, received, and read is by looking at the small time stamp that WhatsApp shows at the side of every single message or under it.