Assume that you have a list of things or entities such as students, files, dates, products, and so on. Now, suppose that you want to execute a group of job entries once for every entity in that list.
Suppose that you have a file with a list of names, as for example:
name Paul Santiago Lourdes Anna
For each person, you want to:
For a single person, these tasks can be done with a couple of entries. If you have a small known list of entities (persons in this example), then you could copy and paste that group of entries, once for each. On the other hand, if the list is long, or you do not know the values in advance, ...