Do you have a smart speaker at home?
Yes,I do. Actually, my smart speaker is Siri.

What is a smart speaker?
Smart speaker is some kind of electronic assistant that provides a lot of convenience for people. For example, if want to know how is the weather today, you just have to say some keyword to your smart speaker and then it will tell you what you want to know.

 How does a smart speaker work?
According to the company, they are only actively listening to what is going on in your home and their microphone is still on the whole time in order to detect some keywords you said. In this way, they can provide the service that you need.