The ticks that appear next to your sent texts in WhatsApp tell you about the status of the message. One gray check means your message was successfully sent. Two gray checks mean it was successfully delivered. Two blue checks mean it was read.
If at some point you downloaded WhatsApp and created an account because it was trendy at the time or you had a legitimate one-time use for it, but now never use it and want to de-clutter your phone and make some space, you probably want to delete your account rather than just getting rid of the app. This can easily be done through the iPhone app. Deleting your account will delete all of your account info and profile photo, delete you from any WhatsApp groups you are in, and delete your message history
from your iPhone and your iCloud backup. Here's how to do it:
To share photos or videos in your Status, tap the Status icon in the bottom left and then tap My Status. Now you can take a picture with the shutter button or record a video by holding the shutter button. Flash and low light settings are at the top right, front/back camera is in the bottom right. Choose a photo or video from your library with the icon on the bottom left. Once you make a selection you can add a caption, rotate, add emoji, text or doodle on it. Tap the blue button in the bottom right to set it as your status. Your status will automatically disappear after 24 hours.
WhatsApp Messenger version 2.17.20 lets you ask Siri to read your messages out loud. All you need is iOS 10.3, have Allow "Hey Siri" turned on in Settings -> Siri and give Siri access to WhatsApp in Settings -> Siri -> App Support. If you have all of this set, simply say, "Hey Siri, read my last WhatsApp message."
To send a GIF with WhatsApp you need version 2.16.15 or later. Once you have that, open up a chat and tap the plus sign in the bottom right and select Photo & Video Library.
Now you can select one of your own photos or videos, or you can search for GIFs on GIPHY with the GIF button in the bottom left.