Dear Rizwan bhai
As per Wikipedia car detailing is the performance of an extremely through cleaning, polishing and waxing of an automobile, both in side and out to produce a show quality level of details. Beside improving appearance , detailing help to preserve re sale value of a car.
in simple words car detailing is extreme cleaning each and every part of car , protecting and beautifying them 
Defiantly its addiction so better u stay away from it otherwise once u enter in this world ur condition will be same as now a days one paint ad on tv 
This terminology is bit new in Pak however awareness is spreading fast here but still our local service walla and compound wala living in cave age , they still wash cars with surf and rs50 compound option for any problem.
Its very normal by time and due to environment pollution factors our car skins grab foreign elements like rail dust, brake dust, industrial fallouts, tree sap, water marks etc etc , these are few of aging factors for which u need regular cleasning and for these purpose having very good and safe option from which mostly people here not aware instead only option rs50 "Compounds "
Detailing clay bars clean the paint below surface, some contaminents grip even penetrate the clear coat of paint. detailing clay
alongwith detailing clay lube safely remove all above said contaminations and provide very clean, slick, smooth surface and there is no need to compound for same reason as compound cut a layer of paint clear coat while on other hands clay is non abrasive ( means dont cut paint ) and totaly safe option
