Explain minification and how to implement it

Answer

Minification reduces the size of script and CSS files by removing blank spaces , comments etc. For example below is a simple javascript code with comments.

// This is test
var x = 0;
x = x + 1;
x = x * 2;

After implementing minification the JavaScript code looks like below. You can see how whitespaces and comments are removed to minimize file size, thus increasing performance.

var x=0;x=x+1;x=x*2;