How to: Sub headings appears in google results

[kevinbp]

I notice that many sites have sub headings appearing below their google results.

http://i.imgur.com/A5JxMKD.png
See image for example.

Q: what are these called? and how do we get them?

A5JxMKD.png

[KeriMorgret]

They're called mini-sitelinks, and Google decides when to display them. Here's a post from when they first debuted: http://readwrite.com/2009/04/16/google_gets_sitelink_one-liners