If you're using the score a text feature:

Type or paste your text in the box to find out its readability scores
Click 'save' and name your document to easily return to it
Hover over the differently coloured highlights to see what they mean
Try to fix each issue we've pointed you to in order to improve your readability grade

If you've graded a file or a URL: 

Open the file or URL for editing
Follow the steps above

If you have any other questions about how to improve your readability grade, please get in touch.