diff --git a/README.md b/README.md
index e51679d..503b816 100644
--- a/README.md
+++ b/README.md
@@ -5,3 +5,13 @@ This is a quickly hacked PHP script that will get the latests posts in your sqli
 This was created for https://lacra.ia.br/
 
 License is do what the fuck you want with this.
+
+This just select the date of the most recently updated post. If it is more recent than a stamp file it updates *everything*. Not an issue for a few hundred posts but this might need optimisation in the future if this ever gets used on a larger scale to only update changed posts.
+
+# Usage
+
+Edit config.php and put something like this in your cron tab
+
+``` 
+5 * * * * cd /home/lacraia/writefreely_to_gemini && php -f update_gmi_content.php > /home/lacraia/logs/gmi_update.log 2>&1
+```