I, personally, am not a fan of blogs due to the fact I have always been a very personal individual and scared to put my opinions out in the world.
I think blogs can be a good way to express your views, opinions, personal stories and even have civil debates on matters in society. Blogs are also a great way to read about how others view the world around us and how they would change it for the better. I think they can be very beneficial in helping people open and not be so shy about their writing. Some dream of getting discovered for their opinions, short stories, poems and even articles about subjects.
On another note, I also think blogs can be bad due to the fact that some people rely on the opinions of others to feel validated. I also think that blogs are too mainstream and can be very toxic not only to the writer, but to the readers as well.