To decrease doubts and explain better the objective and how to use the roadmap, will be good if we add at the beginning a section "How to read", to explain...
...that the roadmap is a suggested learning path
...that the correct way to read is from up to bottom
...that you don't need to study and know about everything, but just search about the topics and choose what is better to apply in your scenario (and maybe when we decide about how to apply the suggestion mentioned in #3 add something extra to explain this as well)
...that is a collaborative content, so, if something is missing or incomplete, you must think about how to improve it for the community
To decrease doubts and explain better the objective and how to use the roadmap, will be good if we add at the beginning a section "How to read", to explain...