Parts of this chapter are much more conversational than the rest of this book. The previous chapters were primarily focused on delivering the mechanics of the game; while we're going to cover mechanics in this chapter as well, we're also going to talk about topics that lend themselves much better to a conversation than hard-and-fast rules: aspects of gameplay like story structure, improv, and world-building. Because, at the end of the day, the "big secret" about GMing is that you aren't bound by a rigid ruleset like the players--you get to make it all up. Whether you made it up the week before, the day before, or in the moment at the table, you're always crafting an experience for your players through the decisions you make.