Please give me some information about group posting. 
I’ve never heard of it. What have you heard? What is making you ask this question? Have you done any research? Why do you want to know? What do you think it might be? Why might it be useful to you?
I also don’t know how does group posting happen. I’m interested about it, please do post some information about it in this post. Thank you in advance.
I guess he is talking about Google groups and yahoo groups. Which is absolutely useless.
Well, yeah that was the possible thing he wanted to say.
May be I am wrong but this is what i have got after doing some search online that sometimes group of people try to post on specific topic to create a buzz about certain keyword or topic. This way, they create artificial hype.