diff --git a/README.md b/README.md
index cbbecd9..6d34d51 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,12 @@
 # COSMIC Text
 
 Pure Rust multi-line text shaping and rendering for COSMIC.
+
+COSMIC Text provides advanced text shaping, layout, and rendering wrapped up
+into a simple abstraction. Shaping is provided by rustybuzz, and supports a
+wide variety of advanced shaping operations. Rendering is provided by swash,
+which supports ligatures and color emoji. Layout is implemented custom, in safe
+Rust, and supports bidirectional text. Font fallback is also a custom
+implementation, reusing some of the static fallback lists in browsers such as
+Chromium and Firefox. Linux, macOS, and Windows are supported with the full
+feature set. Other platforms may need to implement font fallback capabilities.