Goal of Blogger

I believe the goal of every blogger can be to keep the originality of the posts, advertisement, referral and good content to attract visitors. 

great and original content that can entice any reader to read their current and future posts.

I think most bloggers do it for self-satisfaction so whatever niche gives them pleasure  and possibly money should be the goal of every blogger. I know a number of bloggers that do it for the sake of interaction only. Yes, they haven't even monetized their blogs.

The goal of a blogger can also be to earn some bucks from their hard work because it is indeed hard to put up a blog with original contents. 

I think a blogger writing a travel blog with his personal traveling experiences has the most unique content with no place for plagiarism is one of the most unique idea. I had started one such blog about 7 years before but lost interest so took its content off. I have saved it all and will publish it in form of a e-Book as and when find some time for the same.  

I have seen travel blog work because travelling gives itself you contents. Every new visit is a new content. 

Not only new content but basic ideas and themes because everyone has his own way of looking at things and choices of places. So one can't go wrong or blamed for lack of ideas.