diff --git a/README.md b/README.md
index af29095..dbf60f0 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,18 @@
 
 > Go port of https://github.com/delroth/grep-nixos-cache
 
+"A tool to efficiently grep the contents of many NixOS store paths for a given string to find. The main use case is looking for vendored libraries through the entirety of a Hydra evaluation."
+
 **I'm petty, sue me.**
+
+# How to use
+
+```console
+grep-nixos-cache --needle "what-to-search" --path ""/nix/store/...""
+```
+
+# Why does this exist?
+
+1. I don't want Rust on my system
+2. I don't want flake-utils on my system
+3. Felt like it