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Sometimes.
It can keep the reader engaged in your topic and give you more feedback and information.als
It can also turn the attention to the reader and get them thinking about what they would do in certain situations or what their view is on comments made on the blog.
It keeps the blog open and shows the reader that you welcome their input.
I think it depends on an author`s idea. If the author going to create a series of articles dedicated to the hot topic the question might be used a But i m agree, this trick is not necessary.
hmmm not always
Yes, it helps. Sometimes, I even post a poll.
No it is not necessary at all. The blog should be engaging enough to arouse their natural curiosity and interest.
