A good place to start is explaining what hair extensions are all about. In a society where immediate results are very popular, the beauty industry has developed and improved the ancient technique of adding human or synthetic hair to your own hair and make it appear that emerged from his own head.
We say 'ancient' because people have been doing this forever, with wigs, hairpieces, weaving and so on. Many of the current methods have been adapted from African-American stylists that weave human or synthetic hair into corn rows for a long, loose and look natural.