These are tab items that can be used to house smaller segments of your site. They function much like a layout container but on the actual site only one tab shows at at time. Users switch between them just by clicking. They are very similar to how tabs work in a web browser. Use the gear icon at the top right to make any changes such as adding/removing tabs, changing layout, or renaming. There is a video tutorial on this for you. These are put here just to give you a starting point in your page layout. You do NOT need to keep this. Use only if it fits in your overall design.