Why I write
I want to write more and more better.
You can write in a diary or journal too, but a public blog is different. There you write something that needs to be read by someone else. If you want to write well you need to understand your reader well. You structure your text differently in that case, information must be presented in a way that the reader can comprehend what you're trying to convey. In my head I have all the context I need to comprehend my own ideas, but for the reader I, as a writer, must build that context.
Good luck me.