I am answering this as someone who currently owns a business but who previously worked a long time as an employee in a "Yes Sir" and "Yes Ma'am" environment.
The owner of the business recently approached me about the blog posts I'd been writing and said they were too technical and aimed at the wrong people.
The owner of this business pays you guaranteed money to do your job and she is the one who defines your job. Unlike you, the owner of this business does not earn guaranteed money. She is instead paid strictly on the basis of performance. She gets the big bucks if the business is successful and loses her investment if the business tanks.
She was motivated to tell you to change direction. That means she believes that the posts you are making a threat to her income or worse her investment.
You are the noob, she is the most senior person who has all of the skin in the game and who has watched lots of previous efforts to make money succeed and fail.
Now, if what I have said so far has not made you angry then I think you are a person with enormous potential.
If I was in your situation, I would visit the owner to discuss the blog. Your goal in this visit is to listen. What you need to hear are.....
-- who the intended audience is
-- what the intended message is (sample topics)
-- what result is hoped for
After hearing this the goals of the owner should be very clear to you.
After hearing this if you think that your idea targets a different goal then you can explain that goal to the owner. It is possible that the owner will agree and want to do both - if that is the case you might need two blogs or a way to attack your goal on a different part of the website. It is also possible to get agreement but the owner thinks that your time is most profitably spent working towards her goal.
My employees sometimes disagree with me. Sometimes they have an idea that is better than mine. Sometimes they have an idea that just as good. I want to hear these ideas because if they are good and successful then I am the one who will benefit the most.
How you play this depends a lot on the personality of the owner. If the owner is "always right" then it might be best for you to suck it up and do things her way. In that situation I would not try to change this person's mind unless I was really confident about my idea and could make a rock-solid case for it.
However, if the owner values input then you have an opportunity to make a valuable contribution to her business. And, your willingness to discuss the topic to learn and provide input will be valued.