In simplest terms, a startup advisor is a professional who has expertise in the related industry or activity, providing advice, mentoring, and networking connections in the field of the industry or topic of interest to the startup founder or entrepreneur. In many cases, startup advisors are able to bring the knowledge and experience a startup team might be lacking, and assist in overcoming many pitfalls in starting and growing a startup. Advisors who have actual experience as startups understand the challenges of starting and growing startups, and they can give you insights, advice, and connections with networks that will help you achieve success.