There are two possible answer, none of which is a better options than the other, different company are looking for different answer:
1 - you want to climb the corporate ladder and want more responsibility => they want that answer if they are planning to grow the team and need people that will take the manager position when that happens
2 - you want stability and to become an expert at that one job, no plan to move (choose whichever personal project of yours outside of work is your focus here, family, house, dogs, sports…) => they want that answer if the team is already quite big and they already have “manager” potential in it. They now need people that will not quit for a better paying job quickly.
There are two possible answer, none of which is a better options than the other, different company are looking for different answer:
1 - you want to climb the corporate ladder and want more responsibility => they want that answer if they are planning to grow the team and need people that will take the manager position when that happens
2 - you want stability and to become an expert at that one job, no plan to move (choose whichever personal project of yours outside of work is your focus here, family, house, dogs, sports…) => they want that answer if the team is already quite big and they already have “manager” potential in it. They now need people that will not quit for a better paying job quickly.