We really need to redo that front page . Ash can be used with or without Phoenix. Ash is an "application framework", and is designed to help you structure your application, something you do by creating resources using `Ash.Resource`. A resource typically refers to some domain object/action. In this resource you declare the "actions" that operate on your resource. There is a lot more to it like GraphQL & JSON:API extensions, all kinds of additional tools and utilities.
In a lot of ways, it tries to cut a good balance between a lot of concepts. The examples at the bottom of the front page show some examples of the way you use it. There are example apps linked from the Media page as well that can illustrate how it works.
I know the front page is missing a lot of key information, but I promise there is tons of useful stuff in Ash, not just buzzwords