I guess you have become a bit tired with all these general details, installations, configurations, integrations, and so on. We have been walking around Redmine for three chapters, but have not really worked with it (besides the settings, of course). This was the last such chapter. In the upcoming chapters, you will be learning how to use its main features (through the web interface).
In the next chapter we will review the primary feature of Redmine, which is really well implemented and which made Redmine so popular. This feature is issue tracking.