What's An Authoritative Website?

When I did some research on this topic what I found that this phrase covers everything from content to links to blogs to... For my purposes tonight, when looking at website that are selling products/services websites it is clear that some appeared 'authoritative' but many others did not. Sounds pretty general doesn't it. Let me explain.

Authoritative quality in a commercial website equals "success" because it raises your credibility to the visitor. In other words, if you are selling, for example, bonsai but only have the basics of what kind of Bonsai they are and the price, this does not give you/your website authoritative quality. If you are selling bonsai and you write about the care, watering, fertilizing, trimming, what you are doing is showing not only do you sell a product; in this case Bonsai, but that you are an authority of Bonsai. Which website do you think would make more sales?

When you look at selling a product/service, you can see that authority of the product/service can equal more revenue.