Start page is the main page of the website, so this page type shouldn't be used with any other pages on your site. We will go through here the layout of the page if you need to edit your home page. In this example we are using the home page of Australian website. You can view the Austalian homepage here.
Starting from the top we have the main content in the Hero area: Background image, heading and CTA link.
Background image is the main image of the home page. The heading text is placed on top of the background image. Also the CTA button is placed on top of the background image. The text in the CTA button is defined in the text field under CTA link and then the link address is defined in the Url field under the text ("About Orion" in this case). If you want that the link set in the Url opens in a new window (instead of opening in the whole window) select the "Open in New window" checkbox.
Then if you scroll down a bit you can see a Content Area where you can add blocks.
These blocks are displayed under the main hero image. The "Products", "Therapy areas" and "Get in touch" blocks in this example are split hight blocks.