Mahboob - I presume the Blog posts would be public & therefore searchable with search engines like Chrome. But is there also a way to flag certain Blog items as private - members only? 

Would we use the Post edit question?
Do you want to protect this content?
 No, do not protect this content (non-members can access it)
 Yes, protect this content (members only)

Also, related question, I see there is a post Tag called Free Resources - where & how is this Tag used?