Reputation is what your existing customers think of you. Authority is what buyers who have never heard of you discover when they search.
It's the articles and guides that appear when buyers research your category. The answers your company provides when buyers ask questions online. The citations AI systems use when recommending suppliers in your space. The topical ownership that signals to Google you are the definitive source in your field.
Authority is measurable — in Google rankings, in AI citation rates, in the share of buyer searches where your name shows up instead of a competitor's. It compounds. And it creates opportunity that traditional marketing cannot replicate.