diff --git a/README.md b/README.md
index b3ef3c1..7ecb7bf 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,13 @@ Try out the sample checkout
 http://crackthecode.co.ke/MPESA/sampleCheckout.php
 
 
-What happens
+What happens?
+
+1. You request for a checkout through the requestcheckout.php; which runs a ussd prompt of the oline checkout to the phone number. 
+2. Response is sent to your phone for verification; through your bonga pin.
+3. After verification you are asked to confirm payment .
+4. After confirmation transaction is processed by callback url processcheckout.php
+