Query regarding web API verbs

Hi 

I was reading web api verb and the tutorial says

1. Get - for getting the data

2. Post - Inserting the data

3. Put - Updating the data

4. Delete - deleting the data

But I have written a code using entity framework to insert the data in post method and copied the code in put and delete as well. In all the three places, code is working fine. Then what is the purpose of Put and Delete.