Think of the Browse Search as a traditional catalog search (if you are old enough to remember those). The public interface of Primo VE/Find It utilizes the Alma browse capabilities. Search results only includes records from the Institutional Zone, not Network Zone records that are available to the institution. In other words, ebooks we can access through PASCAL collections are not included.
Libraries can customize the name and fields searched or opt not to make Browse searches available at all.
When to use?
Z711 something PS628 and you think it might be M or N that comes next