Hi Jodi,
From my understanding, this is about making the mock data in your project looks real. Faker's website offers a API list, indicating different datasets you can generate from. I run into it because we need mock employee persona in an occupational health and safety project.
If you mean how it works, in my case, I tried to run this library as a Java Trigger, but it returned error. So I decided to try run it as a separate entity out of Storyline. At the end of the day, we have:
A web object: Load this object on any storyline slide you need data. It generates, configures what to generate, and store the generated.
Local Storage of your browser: host the data from last step. Bridge your web object and Storyline player, because both of them will co-exist in your browser when you use it.
Storyline Player: whenever you load the web object, you will set up JS Trigger to import data and interpret them in a way that SL can understand, so SL can display them as you desired.