This usually means automating some Web Vulnerability Browser workflow or an specific Static Analysis of source code.
In this case what we have here is an non-professional programmer or security consultant, Sarah Baso from OWASP, writing/customizing an O2 script to batch create the attendee and speaker participation certificates of the OWASP AppSec Brazil.
I think Sarah based her code on this 2010 O2 Script: Creating PDFs with OWASP AppSec Brazil Certificates.
Here is what the 2011 version (of a PDF created from a DB list of users) looks like:
