FAQ's

If someone hops on to your Wifi, then there is more at stake than just checking e-mails or streaming videos. This person can intercept all the data flowing in and out of your network. To prevent any unauthorized use, use a sufficiently strong password. A strong password consists of at least six characters (and the more characters, the stronger the password) that are a combination of letters, numbers and symbols (@, #, $, %, etc.). Passwords are typically case-sensitive, so a strong password contains letters in both uppercase and lowercase. 

Switch off the modem when not in use as it not only saves electricity, but improves your network security. When the device is off, hackers cannot target them.
A lot of websites and apps keep consuming data, even when you are not using them, thus it is important to turn off the Wifi on your devices when not in use.

When multiple devices like smartphones, tablets, PCs, laptops, HDTVs are latched on to a single Wifi, the data consumption significantly increases. Be aware of the devices connecting to your Wifi and turn off the Wifi on the device when not in use as most apps and a lot of websites keep consuming data, even when you are not using them.