They will show you the store and give you tasks on how to help customers, displaying competencies in customer service, this depends on deparments because if you work in another department, they will make you tag or fold clothes.
I applied online. The process took 2 weeks. I interviewed at NEXT (Manchester, Inglaterra) in Oct 2020
Interview
Filled out work experience, completed personality questions and some basic numeracy and literacy tests. Then had a call from the store manager, general chat and a bit more about you. Asked a few questions about my shopping habits and why Next. Then went into the store for an 'in-store assessment', which entailed some general bits of info and then seeing how you interacted with customers on the shop floor.
Applied online, did an online assessment, then a video interview. After that they made me come into the store and put an outfit together (for a wedding guest I believe) in 30 minutes. You pick out the outfit, jewellery, makeup, shoes, other accessories etc.
Easy interview on the phone then in store trial where i had to help customers and tidy the shop floor. The process was quick and easy and I was offered the job on the spot