This book is about how to run services, in any organisation, in any industry. It describes the basics, the core stuff, in realistic pragmatic terms. And it is pragmatically brief - we kept it to 50 paperback pages.
I must eb thick because I've read those four purposes over and over, and they sound like they are all the same one to me. I guess it is "purpose" singular but why the four bullets? Especially the last three would seem to be entirely redundant