By default, WhatsApp sets your privacy settings to allow:
To change these settings, simply go to WhatsApp > Settings > Account > Privacy.
- If you don't share your last seen, you won't be able to see other people's last seen.
- There is no way to hide when you are online or typing.
- If you turn off read receipts, you won't be able to see read receipts from other people. Read receipts are always sent for group chats.
- If a contact has disabled read receipts, you will not be able to see that they have viewed your status update.
Learn about privacy settings on: Android | Windows Phone | Nokia S40