What is the "dogfood" build?

Question

What dogfood build does mean? I mean, I know alpha versions, beta versions, but I never heard about dogfood. For which dogs people this build?

For example here: https://github.com/JakeWharton/u2020/blob/master/build.gradle#L29

Answer 1

"Dogfood build" designates builds produced for internal use within the company, typically for finding bugs in new features that would be to embarrassing to show to an external customer.

The name comes from "Eating your own dog food" colloquialism, which refers to companies using their own products for its internal operations. The term is believed to have originated with Microsoft in the 1980s.