Higher order Functions

So I was going through lot of YouTube videos on this topic...wich made me eventually find wtf is this concept ...is ..
In javascript a function is nothing but an value,

Consider

    Function Myrollno(value){
       return  value
            }

   let outputvalue = Myrollno(21)

    So if we 
   console.log(outputvalue)

    Output :
       21

Hmm...so what happens we pass function instead of a value to the function ....that's what Higher order functions are...

Still not clear .. consider
the example below

    var filtered = [12,5,8,130] ;

    functionisAboveMyRange(value){
        return value >= 25;
     }

   filtered.filter(isAboveMyRange);

So 'filter' Function is called as an Higher order function ,the function we pass as Argument is called an callback function...

Still having Doubts comment it