The phrase "several screenshots" means having multiple pictures of what is shown on a computer or phone screen, taken at different moments. Full definition
Such tools also provide facility develop the course just out of several screenshots of application if the access to the application is not available. (upsidelearning.com)
The listing has since been taken down but not before several screenshots were captured. (knowyourmobile.com)
Users can browse through several screenshots by swiping left / right. (crackberry.com)