This site names this specific bonus guide directly as Bonus 5: the Personalized Usage Guide.
This site describes it directly as tips for timing and getting the most from your routine — worth reading it as the most directly product-related of the five bonus guides, distinct from the relationship-themed guides.
This site publishes its own routine and habit guidance directly on its homepage at no extra cost — worth comparing this bonus guide's content once received against what's already freely available on the site itself.