As conceived, it is for managers of clubs and national teams in the UK and Ireland, which will include people like Klopp, Guardiola, Sven-Goran Eriksson, Berti Vogts, Giovanni Trappatoni and Fabio Capello. There's a nationality column so the foreign managers will stand out.
But there's no reason it can't be expanded. It's just a collection of lists, and we can easily add more lists to it, like Danish Managers, European Cup Winning Managers, Assistant Managers And Coaches. If someone is specifically interested in researching and connecting people in "categories" like that they are welcome to use the page.