The word "maven" refers to a person who has a lot of knowledge or expertise in a particular subject. They are considered an expert or a knowledgeable individual in their field.
And smart companies court such people thus creating a small army of mavens for their products. (bookbuzzr.com)
Resplendent in its sunset metallic paint (a new color this year) set off with 19 - inch «Luster Nickel» wheels ($ 695) and silver roof rails, our nattily attired Ford Escape Titanium was the style maven of the group. (automobilemag.com)
Other examples of bloggers / content creators and social media mavens who have parlayed their online presence into professional speaking (not to mention publishing deals in many instances) include: (prwarrior.com)