The step to turn off conversation mood in Gmail is the following steps :

Step 1 : Go to 
Step 2 : Click over Setting icon, and from the list, click over Settings
Step 3 : make sure you are in “General” from Settings options , then Scroll until your reach “Conversation View” . 
Step 4 : SelectConversation View off
Step 5 : Click over “Save the changes ”  
and that way you will get each email separatist rather than as conversation or thread