diff --git a/guide/english/typescript/boolean-type/index.md b/guide/english/typescript/boolean-type/index.md
index b50b562d6d..235929e9b4 100644
--- a/guide/english/typescript/boolean-type/index.md
+++ b/guide/english/typescript/boolean-type/index.md
@@ -4,8 +4,10 @@ title: Boolean Type
 
 # Boolean Type
 
-`boolean` is your basic JavaScript true/false value.
+`Boolean` is your basic JavaScript true/false value.
+`Boolean` variables are used to indicate whether a condition is true or not, or to represent two states, for example if a light is on or off.
 
 ```typescript
 let isDone: boolean = false;
-```
\ No newline at end of file
+let isTurnedOn: boolean = true;
+```