Go Walker - for such a service?

Question

go

Often, during the search, I get to the site https://gowalker.org
Tell me what kind of service it is, what it is intended for.
What is this Rank that is assigned to libraries on this page https://gowalker.org/index

Answer 1

Go Walker is a web server that generates Go projects API documentation and Hacker View on the fly for the projects on Bitbucket, GitHub, Google Code, Launchpad and Git @ OSC.

Generates automatically documentation for Go projects.
Rank - the number of page visitors.

Answer 2

A sort of alternative to godoc.org from Chinese gophers