Blogging and english

A friend said, "just keep on updating ur blog..."
I was like..eeyyh? No one is reading it...
Friend:yeah? But if keep on blogging u'll improve ur english in time...u r going to start working in few months time..time to brush up ur english
Ann : haih..but then...grammar???? Cemprohension?? Bla2
Friend : this is not school la! Mana ada cikgu!!!
Ann : ok..hmmm...