But there's more to it. Here's a talk by Kevin Paulisse at PuppetConf 2016 on how Github went about from simply using Puppet in-house to developing a culture around its use.
Duration is approximately 45 minutes.
Clearly, starting to use Puppet is only the first step. What I particularly liked about Kevin's presentation is Githubs all-round approach which involved helping newbies all the way up to old-hands in the org.
Certainly something for everyone to think about.