By default, WhatsApp sets your privacy settings to allow:

• Any WhatsApp user to see your read receipts, last seen, about and profile photo.
• Your contacts to see your status updates.

To change these settings, simply go to WhatsApp > Settings > Account > Privacy.

Note:

• 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