To me, a “pro” blogger is someone who gets paid to write about certain things, whether it be a brand, specific product or specific topic.
I don’t consider myself an amateur blogger because I’ve been blogging for a long time, but I don’t consider myself a pro either. Does not being an amateur mean I know everything? No. I know there is a lot out there I don’t know and I can’t wait to learn.
I guess in some ways I can be considered “pro-ish”. If I don’t have an answer for your question, at least I can point you to someone who does..