diff --git a/README.md b/README.md
index d39132f..edca091 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,11 @@ Original HTML:
 ```
 
 Parsed JSON:
+A common use of JSON is to exchange data to/from a web server.
+
+When receiving data from a web server, the data is always a string.
+
+Parse the data with JSON.parse(), and the data becomes a JavaScript object.
 ```json
 {
   "tags": [
@@ -31,4 +36,4 @@ Parsed JSON:
     }
   ]
 }
-```
\ No newline at end of file
+```