A video doorbell allows you to see who is at your door via a camera which is incorporated into the doorbell itself. You can check this from inside your home or from miles away, as all information is sent, wireless, to and from your smartphone or tablet. Smart video doorbells have HD picture quality and some will allow you to communicate back to the visitor via audio or both audio and visual, so they can see you as well as hear you.
The full scope of benefits you can get from a smart home video doorbell may not be obvious until you use one, but they can be a very useful piece of kit. For instance, they can help the elderly or those who struggle with fast movement to answer the door without having to get up, and it can help you to identify who is visiting your home while you are away.
Even if you are not there to answer the door in person, a video doorbell has many practical uses. Being able to communicate with a parcel delivery driver while you are at work so you can ask them to leave the parcel in a safe place, for example, is preferable to having to make a separate trip to the post depot to collect it at a later date.