What is a Placeholder? What is an Expression?

A "Placeholder" is the evaluation of a variable. babelforce uses the term "Expression" as the way for you to refer to a variable.

Let's look at an example:

"You have a call from {call.from.number}".

You would be right in expecting this to result in something like this once evaluated:

"You have a call from +33178979877"

So, what exactly is the difference between a placeholder and an expression?

The Expression call.from.number is how to reference the variable that will be shown as the caller's number on an inbound call. And the curly brackets denote the evaluation of that expression. So {call.from.number} including the brackets is called a Placeholder.

To find out more about expressions read this article.