Heyy @mdshanto, if you want to know more I suggest you read more. That's the only way. You can start by reading the pinned posts in our Newcomer's Community. Visit the Lists of Achievement Tasks,Resources & Materials : Newcomers Resources and complete them to know how the steemit ecosystem operates. It will answer all your questions above. You've already completed achievement 1 so I suggest you do justice to the rest :). Welcome to our community.