The retention graph shows what percentage of voters that started watching your submission are still watching your submission at a given time in the video. The downward slope of the graph indicates that viewers are stopping watching. Red highlights on the graph point out areas where viewer drop-off is higher than normal. The line on the graph shows your submission's retention, while the shaded area shows the average retention for submissions that have achieved a passing Guild score. Ideally, your line would fall into that Guild-approved average range. If your submission has excellent retention, it may be above the average Guild-approved range.