Purging a web application removes all the web application scan data from your subscription. Findings from previously completed scans will not be included in new reports. Note that scan results are not deleted and you'll still be able to view scan results in your account.
We recommend you run the optional Web Application Security Status Report when purging web applications. (You'll need the Create Report permission to run this report.)
To purge a web application, select or hover over a web application, and from the Quick Actions menu, click Purge. To purge web applications in bulk, select multiple web applications, and from the Actions menu, click Purge.