When we want to mmake our accounts under secure we have to use privaxy setting for example like instgram or snapchat
pin number means your password that you use it to lock a phone or account. people use it so no one can use there account or phone
http://www.answers.com/Q/What_is_my_pin_number?
https://en.support.wordpress.com/settings/privacy-settings/
By Sultan Al muhairi