When you create a new chapter in ScreenSteps and push the changes to Zendesk a new section or forum will be created in Zendesk.
In the Zendesk Help Center, a new section will be created. The viewing permission will depend on what features you have in your current Zendesk plan. If "internal" sections are available on your plan then the section will be created as an "internal" section (only available to agents).
If not, the section will be created as a "restricted" section (only available to logged in users).
In the Zendesk Legacy Web Portal, a forum will be created with the viewing permissions set to "Agent Only".