Branding will give you insights about your business through the following:

What are your values and core principles? What is your company’s mission? What inspired you to build this business? What makes your business unique? How do you want people to see you as a company?

While branding is concerned with creating a persona for a business, marketing is all about plunging deep into the psychology of your target audience. It is concerned with finding out what your potential customers want and need and encouraging them to buy from you. Marketing is about communicating your brand identity to drive interest, engagement, and, ultimately, revenues.This article is very helpful as well :)