diff --git a/docs/ecolyo/functionalities/challenge.md b/docs/ecolyo/functionalities/challenge.md
index 3e3069ee4ef646a320323b94aaf4fa8c7d1375e3..2c6a9345d84c58047e3cf5f80de04397548d3e58 100644
--- a/docs/ecolyo/functionalities/challenge.md
+++ b/docs/ecolyo/functionalities/challenge.md
@@ -27,8 +27,16 @@ We get all this information to determine the custom question (All information ar
 Then, he generate two randoms answers following the right answer. 
 
 A user can stop during a quiz and picks up where he left off. To define where the user left off, we have to check if at least one of the question result status is unlocked.
-## Mission
+## Exploration
 
+Exploration is a feature which in the user got to do an action in order to help him to discover all features of this app.
+They are 4 types of action : 
+- DECLARATIVE : The user has to do something outside of the app => No way for the app to know if the user did it so we trust him.
+- ACTION : Action whitin the app. When the user finish he got a notification.
+- CONSUMPTION : He got to do something in his consumption view.
+- ECOGESTURE : He need to have a look to a specific Ecogesture.
+
+When the user finish the exploration, he got a success message and five more stars on his challenge progression. 
 ## Duel
 
 ### On launch