Why did that site show up in the search results?

Google has historically been pretty quiet about what causes site to rank well in the search results. They’ll give high-level ideas (fast loading, great content, etc), but no specifics, and you can read many of my ideas from over the years in the SEO category on this blog. They’re still not opening up a bunch, they’ve just cracked the door for a little bit.

While they’ve not added it for every result, in many cases you can click and get some info about why Google brought up that result for you, and it looks something like this: