My main sites have been around since the 90s and so when Google first came out with sitelinks (the expanded type), I didn't have to wait long to see them in most cases.
I launched a new project a few months ago and have gradually allowed the search engines access to different sections of the site. Traffic has been doing nothing but rising very nicely over the past 8 weeks.
Today, I noticed expanded sitelinks for the brand name which is obviously nice :)
Question: When and why does Google display sitelinks? Is it a sign of authority?
I ask because I remember expanded sitelinks being a sign of authority a few years back but a lot has changed since then.