Expert Verbiage:

Definition:

Expert Verbiage is highly specialized vocabulary.  For example, if your Parent Theme is "skydiving", then "reserve static line" is an Expert Verbiage keyword because it is a statistically improbable phrase which relates specifically to "skydiving."

There is a common confusion between an expert verbiage keyword or phrase and long tail keyword phrase.

An expert verbiage keyword or phrase is usually a statistically improbable phrase. Understanding the difference between a long tail keyword and a statistically improbable phrase will help you to select better content for your website.

In the future, search engines will be able to compare the expert verbiage on your website with the expert verbiage contained within the definitive book or article of an industry subject matter expert.