List Custom Settings

What is a Custom Setting?  We talked about Hierarchy Custom Settings in the Keep Clean Validation Rules with Custom Settings post, which let you set a default field value for the organization, then you can assign a value to a Profile or User.  List Custom Settings are a bit different, they don’t relate to Profiles or even users. So, what is a list custom setting?  When would you use it? How would you use it? Lots of questions, we are getting ahead of ourselves, let’s start with the basics. Continue reading