The sprint completion trends report shows you how teams are trending toward their sprint commitment over time to help identify issues with scrum adoption and agile sprint practices.
First, the report shows the total amount of work by ticket status (to-do, in progress, done) relative to the initial sprint commitment so that you can quickly identify teams that are either struggling to estimate properly or having issues completing their planned work due to other factors.
The report then shows a breakdown of completed points by assignee at the end of the sprint. You can drill down by clicking on a data point to see the total tickets committed and completed by each person during the sprint.