As I'm sure you're aware, when you advertise a job, it doesn't matter which country or city, or what working patterns there are, you will get inundated with applications from people who won’t work in the required location, or who don't have that skill. For me, it was very useful to have that checked, and to make sure that when they were coming over, they were fully aware of what the requirements were.
I was a lot more secure in sending people over to managers. I will always speak to a candidate before it goes to the hiring manager, and for me, knowing I was able to spend more time on giving the candidates more information about who and what we do, and give them more insight into the benefits of working here rather than having to drill them on technical questions, helps to provide an overall better experience to that candidate as well, and candidate experience is critical.