Storyline variables make it so easy to personalize experiences for your learners. Variables help you do things like call learners by their names, let them control their interactions, and create a gamified feel. And you can connect strings of variables to create truly tailored experiences for every learner. Check out some of these how-tos that highlight the really creative stuff you can do with variables in Storyline.
And check out the tutorial on adding variables in Storyline 2 if you need help getting started.