These smart locks can be set up to temporally allow someone in on a one-time basis, such as a cleaning service. They also have a tracking capability with history, so you can determine who entered your house and at what time. Great for making sure your teenagers come home on time!
For controlling the lock from your smart controller this will usually use Wi-Fi. You could set up a routine where if you said goodnight “Alexa” a routine would start that shut off the lights, locked the doors and maybe give you a weather report. It is endless on what your routine could be. All of this controlled by your voice.