As pointed out in Chapter 7:

No map on its own can provide all of the information you need to solve a specific genealogical problem, but your use of maps becomes part of a back-and-forth, reciprocal process. Original documents, such as census, legal and church records, usually provide more substantive information. But maps act as invaluable guides to help us interpret the information we gather, just as our knowledge of the history of the place and era we're researching helps us interpret the information we find in maps.

Soon you will be gathering original sources, and having these maps available will help that process go more smoothly and accurately. Put the maps you have collected behind special colored tabs (or beige archival if using the supplies at FileYourPapers) in your Family History Notebook so that you can refer to them throughout your research experiences. Most of the maps on the Internet can be printed. Several can be downloaded to diskette and printed to larger paper at local print stores.