You can photocopy an article and pass it around, giving consistency at low cost .
Training manuals cost a bit more, but they are consistent , portable and inexpensive to reproduce.
Such materials are easily adapted to mass distribution and also easy to use. Print has its limitations, though. Printed materials typically have very limited graphics because color is cost-prohibitive. Users cannot interact with experts or each other, and it's hard to know if your audience actually reads the printed materials you give them.