What education and/or training do you have that relates to your work?
At the speed of Internet evolution, how can you not? I spend at least 6-12 hours per week staying up on the latest developments in Internet marketing, design, usability, security, tools, hosting, and more.
What advice would you give a customer looking to hire a provider in your area of work?
When I first started building websites in 1993, things were so simple. There was no Google, Amazon, or Facebook. My how things have changed! Designing, building, hosting and operating a website has become way more complicated. It's become very difficult for a "Web Design" company to be able to handle all aspects of what is needed to create an effective online presence, so many companies will do their best to hide their weaknesses.
They might design beautiful-looking websites, but only pay lip-service when it comes to SEO, resulting in a shining diamond sitting in the middle of a desert.
Or, they might be SEO experts, but the usability of the site sucks. They get tons of traffic to your website, but conversion into paying clients is weak.
Or they don't help with hosting, or know how to keep hackers out of your site, or even have effective copywriters on staff...
Make sure you are thorough when interviewing providers and don't settle for simple "Oh yeah, we do that!" answers.