diff --git a/readme.md b/readme.md
index 0ae9d11..af4e57c 100644
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+++ b/readme.md
@@ -5,6 +5,11 @@ Makes your configs (almost) see-through.
 
 Glass is a Lua library that makes it easy to lazy-load configuration files into a Lua table at runtime. Its main purpose is to make accessing different configuration files "transparent" to the programmer.
 
+With Glass, you can index a key in an object in a JSON file in a subdirectory as if indexing a nested table.
+
+As a side effect, it also decouples the code from the config format:
+your program doesn't need to care whether a specific configuration file is in YAML or JSON format as long as the structure is correct.
+
 ## Example
 Assume the file `app/config/settings.json` exists in your project directory with the content `{"user":{"name":"User"}}`