In reply to BobWP.

Bob, I would outline two scenarios here.

The first one is the enterprise/corporate world. Titles are established, job descriptions are well defined, and HRs use these in order to assess skills, expertise and such while recruiting talent. Experts are also aware of what they do (that's what everyone would expect) and they apply for job offers based on their skills.

The second definition is social media, marketing and other divisions that require no education or specific skills. The difference here is that, looking for a social media expert, you'd expect some large number of followers and a list of other people with the same results. Same goes for other fields, but just looking at a portfolio of beautiful WordPress sites with premium templates is not a viable way to assess the skills, expertise, or quality whatsoever.