Hi Gaurav. This is how I remembered "Push" vs. "Pull" communication.
I am sure you have a mobile phone. The settings for any mobile phone to receive emails is "PUSH". When you send out an email to report on project status, you only want to send out to SPECIFIC people.
As for "PULL", pretend that you are in a large crowd and you want attention from everyone, so you want to "pull" everyone ears to listen to you, and so you are sending information to a LARGE group of people.