Explain what a devfile is in a cleaner way

libs/docs/src/docs/no-version/what-is-a-devfile.md

@@ -3,16 +3,14 @@ title: What is a devfile
 description: What is a devfile
 ---
 
-You can use devfiles to automate and simplify your development process
-by adopting the existing devfiles that are available in the [public community registry](https://registry.devfile.io/viewer)
-or by authoring your own devfiles to record custom instructions to 
-configure and run your build environment as a YAML-formatted text file.
-You can make these devfiles available in the supporting build tools and 
-IDEs that can automatically process the devfile instructions to configure 
-and build a running application from a development project.
-
-Using the recommended best practices from the devfile, the tools and IDE
-can:
+`devfile.yaml` describes how to configure and run build environment for
+your project in a development container. You can create devfile from scratch or
+adopt existing from [public community registry](https://registry.devfile.io/viewer).
+
+Certain build tools and IDEs can automatically process the devfile
+to configure and build a running application from a development project.
+
+Using devfile, the tools and IDE can:
 
 - Take in the repository hosting your application source code.