Users have options to lock super personal chats
Users can hide their personal chats from others
You can secure your chat by enabling fingerprint lock
Users can send photos in high quality
Users can hide online presence
You can hide profile picture from users you want to hide it
The message yourself feature is available for users.
You can search messages on WhatsApp
You can mute chat and hide it
You can find starred messages easily. You can find it by going through settings and then starred messages