Question about Xiaomi Smart Air Purifier 4 Compact

What is ionic pollution? The thing measures the dust in the air and if it finds there is dust, the air is sucked in and pressed through a filter that catches the dust. Our purifier is in the bedroom. If I drill a hole in the room next door, it notices the increased dust content in the air (not visible to us) and then cleans all by itself for a few minutes. It doesn't produce any ions and our appliance isn't connected to any WiFi (I don't know why). I didn't expect much, but the thing works!