diff --git a/docs/explanation/index.md b/docs/explanation/index.md
index d9e057a..44a96af 100644
--- a/docs/explanation/index.md
+++ b/docs/explanation/index.md
@@ -2,10 +2,20 @@
 
 This section of the documentation covers the core concepts of Chisel.
 
+## Overview
+Chisel was created to build a minimal, secure Ubuntu root file systems.
+
 ```{toctree}
 :maxdepth: 1
 
 mode-of-operation
-slices
 faq
 ```
+## Package slices
+Slices are defined via slice definition files and follow naming conventions.
+
+```{toctree}
+:maxdepth: 1
+
+slices
+```