The Pig Editor application allows you to define Pig scripts, run scripts, and view the status of jobs. For information about Pig, see Pig Documentation.
Pig Editor is one of the applications installed as part of Hue. For information about installing and configuring Hue, see Hue Installation in http://www.cloudera.com/content/cloudera-content/cloudera-docs/CDH4/latest/CDH4-Installation-Guide/CDH4-Installation-Guide.html. Pig Editor assumes an existing Pig installation. The Hue installation instructions include the configuration necessary for Pig Editor to access Pig.