Lightning pages (or FlexiPages) are essentially layouts created from a blank page with the Lightning App Builder tool. You or your customers can drop the preceding components and any others on them to create a new page. Unlike Visualforce pages, they do not have a URL for accessing them. The only way to display a Lightning page is to create a Lightning tab for it. This can be accessed under Tabs under the Setup menu. Lightning tabs work in Lightning Experience and Salesforce Mobile. This is how the Race Overview tab has been built.