Eat Your Own Dog Food

Describe what this meant for us, especially in using our own and customer tools, but there are probably other examples as well?
Maybe this should be part of a collection of "slogans" we used a lot, like  💪⁠⁠Do It Live⁠  and others?
Examples of us eating our own dog food:
  •  🛟⁠⁠Help Scout⁠  as internal helpdesk / knowledge base