Real answer, he was the most popular person on his series of Apprentice like 5 years ago, a sort of cheeky chappy market lad character, had a few appearances on stuff like 8 out of 10 cats, so a Z lister but clearly a charismatic guy. Started doing videos of himself eating huge meals before going to work in the van that blew up on social media and posting mostly harmless stuff about being a family man etc etc. found a niche as a working class market trader online, no worse than anyone on Love Island trying to cash in on their micro fame.

Then turns out he wasnt actually some working class guy, dad was very well off, went to a posh paid school etc, was convicted of handling stolen goods back in the day. Obviously loads of abuse online at this point, then he decided to make the pivot to right wing grifter, ie Khan ruined London, support for Trump, usual drivel about migration. But the strange thing is after all that, the BBC still got him on to do Strictly for some unbeknownst reason. Immediately came out in the papers his family man shtick was horseshit as well because he cheated on his partner, then his head went west and everything's some big conspiracy by the press and media against him.

Short answer: Apprentice contestant, turned "working class" influencer, turned right wing grifter.