It is possible to display additional information about your course on the right hand column. These boxes are called "blocks."
If you would like to add a block to your Moodle course, turn editing on and find the "Add a block" box at the bottom of the left menu. If the left menu isn't visible, click on the button on the top left of the page. From here, select the block you would like to add and it will appear on your page.
It is possible to remove a block from the main Moodle course page by turning editing on, clicking on the gear icon in the block, then selecting delete.
In editing mode, it is possible to adjust the order of the blocks. Click on the four-way arrow icon and drag the block to the desired position.