What is SharePoint Search Verticals?
Search verticals are tabs on the search result page that show results of a specific type or from select sources. For example, the Files vertical shows results classified as files and makes it easy for users who are looking to find documents. You can customize verticals in Microsoft Search to meet the needs of your organization or individual departments. Microsoft Search has two types of verticals, out of the box or default and custom verticals. The default verticals, such as All, Files, and People, create easy access to the most commonly used search results.