This screenshot shows the content of the Skill Tester after a user has entered "I want to order some drinks".
On the left side of the screen is the conversation, including the user's input and the skill's response.
On the right side of the screen is a pane with three tabs: Conversation, Intent/Q&A, and View JSON. The Conversation tab is selected. Within the pane is a visual representation of the flows and individual states traversed in the conversation. In this case, it shows a progression from the Main Flow to the handler.startSkill flow (within which it traverses the checkUserType, welcomeUser, and endFlowAndKeepTurn states) to the Main Flow (again) and then to the intent.reg.order flow (within which it traverses the checkIntent and resolveDrink) states. 
Below that is a table that lists postback actions (with columns for Label, Keywords, Action, and Variables).