What is an accessibility champion?
An accessibility champion is not a profession in itself but a role you give someone working in a profession that requires a knowledge on implementing accessibility. This would be people like UX’ers, designers, frontend developers, QA testers or similar, although job titles may vary across product teams.
An accessibility champions role is to drive the change and the process and be a point-of-contact for colleagues.
But remember! It is not the responsibility of an accessibility champion alone to deliver accessible products.