Ask HN: What are some tips for a former QA now starting as a Business Analyst?

Hello HN, I am a web application QA engineer of several years, recently promoted to a business analyst role. We are a mid-size, 10+ years old company.

I will be joining a team of two senior analysts next month. Do you have any tips or sources for me? Are there some pitfalls I should know about, stuff I should learn?