The Start page is the page that you see when you launch Edge. You can decide what you want to see as soon as you launch the browser. To do this, click on the Main menu on the top right corner (it has three horizontal dots), and then click on 'Settings'. In settings, you will find options to customize Start page under the heading 'Open With'. Here you can select, Start page, New tab page, Previous page and A specific page or pages.