Ask anyone with a passing interest in cars where they search for them and it’s highly likely they’ll say Auto Trader.   The classified car advertising giant has been a staple of the motor trade for four decades and has morphed from a magazine to an app available on smartphones.   But just how did Auto Trader get so big? How did it grow from a well-thumbed mag to a tech titan that last year made £25m profit every MONTH? In this special podcast, we’ve chatted to car dealers, consumer and motoring experts, as well as the very people leading the business to look at how Auto Trader grew into the advertising giant it is today.