I think blogging is useful for everyone; reader and writer both.. for writer it is big challenge to write something new in his/her own words. Blogging have many advantages toward both writer and reader.
writer:
= Writer's knowledge will be improve.
= writing scale will be improve of a writer
= Writer will be improve in writing consistence sentence, consistence paragraph.
= Writer will be able to know about how to develop reader interest in reading.
= Writer's gray-matter will start working properly