With custom tabs, you can give users quick access to internal and external URLs. The feature is especially useful for hosting CMS apps and displaying web pages that help users create and manage content. For example, you could use a custom tab to host an app for creating newsletters. Or you could configure a tab to display a wiki or an online dictionary in the Apps pane. The target URLs may be static HTML pages or dynamic pages of any kind (e.g., *.aspx pages).