She points to research by King's College in London which finds a 16-year-old's understanding of maths today is not as good as it was in the 1970s.

BBC: Elizabeth Truss MP calls for maths teaching revamp

Asbury Automotive Group, which owns 77 dealerships including Nalley BMW, the site Mr. Morar visited, announced last year that it was using Dataium's code "to obtain a greater understanding of how auto shoppers are engaging" with its stores.

WSJ: They Know What You're Shopping For