Wi-Fi is great for you to connected with your friend ,but a poorly secured Wi-Fi can put your personal information at risk . You should protect your router password and change the password regularly to protecting your network and your data .If you don’t know I will guild you How to Change Your Wifi Password .
Step 1 : Find Your Router’s IP Address
On a Windows PC, you press Windows Key + R, type “cmd”, and press Enter.
Then you type “ipconfig” to find ip of router , it’s “Default Gateway”
You open your browser and type ip of router , ex : 192.168.1.1 , then you type user name and password your modem. example my modem is Tplink, so I type admin/admin
From the menu on the left hand-side of the screen select “Wireless”.
To change wifi name from the sub-menu you select Wireless Settings => Wireless Network Name, then you click save .
To change wifi channel you select Wireless Settings => Channel
To change the wifi password, you select Wireless Security from the Wireless sub-menu on the left => Wireless Password, then you click save
I hope you will know how to How to Change Your Wifi Name and Password
