quick expire example

README.md

@@ -114,6 +114,17 @@ For a list of Redis commands, see [Redis Command Reference](http://redis.io/comm
 Minimal parsing is done on the replies. Commands that return a integer return JavaScript Numbers, arrays return JavaScript Array. `HGETALL` returns an Object keyed by the hash keys. All strings will either be returned as string or as buffer depending on your setting.
 Please be aware that sending null, undefined and Boolean values will result in the value coerced to a string!
 
+# Redis Commands
+This library is a 1 to 1 mapping to [Redis commands](https://redis.io/commands). It is not a cache library so please refer to Redis commands page for full usage details.
+
+Example setting key to auto expire using [setex command](https://redis.io/commands/setex)
+
+```js
+// this key will expires after 10 seconds
+client.setex('myKey', 10, 'Awesome value!');
+```
+
+
 # API
 
 ## Connection and other Events