I have heard about bitcoin from my friend that it is a website from where we get a digital value known as cryptocurrency for that we have to write down from our view about the topic given
Well I was a little confused in your reply. Bitcoin is the cryptocurrency that we earn, we earn that from the signature campaigns here in Bitcointalk.
We answer some questions, queries or statements and give opinion based from the post that is being posted by the OP. So in short you must have the knowledge to answer the posts.
I was the same as you when I first heard bitcoin. And when I read many posts here I do not really understand some terminologies here like segwit and stuffs concerning the bitcoin technology.
But this site tells them all and you just need to read them.