We are living in a world full of people with ill intentions. So how do these ill people monitor your WhatsApp? WhatsApp has a feature where you can connect up to 4 devices concurrently. What does this mean? You can use WhatsApp on your phone and the extra devices at the same time even if your phone is off.
How do they connect your WhatsApp to their devices?
By scanning WhatsApp QR code on their device using your phone. This can happen within seconds, so avoid trusting your phone with every Jim and Jack.
To check if your WhatsApp is being used on other devices, go to the three dots (Menu) on your WhatsApp then click on linked devices. You will see all the devises using your WhatsApp and when they were last active. You can logout from the devices you don’t know by tapping on the device name.