if someone nearby your home or office is stealing your wifi then you should be aware of it. if you do not know about the thing then you can restrict their access to your wireless internet. They can be criminals & using your wi-fi in order to do some illegal activities for their benefit. But this can be a huge loss to you in terms of money & respect.
So you need to know how you can protect your wi-fi network
So check our amazing article for WiFi security [url="http://technicalbudd.com/2017/05/whos-on-my-wifi/"]Who’s On My Wifi[/url]