The SEO report allows you to get information about the optimization of your pages, such as; Headers being used correctly, if alternative texts have been added to pictures, if there has been added a browser title and description etc. All this information will effect how your website is ranked on the search engines.
The SEO report will only work after a page has been published. To check the SEO before releasing it to the public, you can set the page property access 'In menus' to 'Hide' and then publish it. This will make the page accessable by the SEO report module.
When the page has been published, a module will appear above the content area. Click 'Update' to get a fresh report. (3.1)
After the update, a report will be available by clicking the arrow on the right-hand side of the module. (3.2)
At the top you can see the score for the selected page (the result will be highlighted with red, yellow and green, for clarity).
A number of stats will be shown (can be in a different order than shown in the image below):