They have a "Discovery Day" where they invite you to come to their office for about 6 hours. I didn't even get an invite until three days before the event because they accidently sent me a rejection letter beforehand and the subsequent invitations were sent with unauthenticated emails so it all ended up in my spam folders. Also, they booked me a hotel room the day of because, even though they had my address, they didn't realize that the City of Toronto is located within the Greater Toronto Area.
On the day of, first thing they did was give you breakfast. This was the first test because every human being on the planet would assume that "breakfast" includes coffee, but there isn't any so you'll have to do all of the day's activities uncaffeinated. And even though Unilever is the world's largest tea producer, there wasn't any tea either which just added to the disappointment.
After that, they put us into groups of three and they have the guy from HR pretend to be a concerned mother. Then they put us into groups of six people who you barely know and you are given an hour to create a 10-minute presentation based on a 21-page case study. And halfway through this one hour one of the HR guys barges into the room and starts handing out printed out emails and talking about "oh yeah, i should've gotten this to you earlier but it just now came in". It was obviously scripted, it's surprising that they even bothered to pretend like it wasn't planned ahead of time. Naturally, when you have to work alongside people you're in direct competition with, there is quite a fair bit of stress. It was like some Hunger Games kinda stuff, but instead of surviving
After that, they have a "Mentorship Session". In other words, after this entire ordeal, they thought they'd stick a traditional 2-on-1 interview on the end, because why not? I think you're supposed to take advantage of this situation to low-key talk about how everyone else that you're competing against sucks. I didn't do that, but in hindsight, it may have been a good strategy. Also, they seemed to have an outdated copy of my resume from a year ago. I honestly have no idea where they got a hold of it, probably from my internship application from a year prior.
After that, they give you some disappointing sandwiches, a litre of Ben and Jerry's, a water bottle, and tell you to leave.
I was one of the very first people that they ever put through their new recruitment process, so presumably your experience will be more polished than mine. But it was fun peering into the darkness inside a 50 billion pound company, past the thick polish and veneer of their colossal marketing budget, to see the relative chaos within.