Update README.md

Closes #37038
https://github.com/dart-lang/sdk/pull/37038

GitOrigin-RevId: 9ef2f53b001a485244362af511a2c4a2a19ccd0b
Change-Id: Ia48a49f4b0ddf822ec6215256ac16f3e67b86982
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103240
Reviewed-by: Kevin Moore <kevmoo@google.com>
diff --git a/README.md b/README.md
index 51f129a..195667d 100644
--- a/README.md
+++ b/README.md
@@ -1,15 +1,43 @@
 # Dart
 
-[Dart][website] is an open-source, scalable programming language, with robust
-libraries and runtimes, for building web, server, and mobile apps.
+## A client-optimized language for fast apps on any platform
+
+Dart is:
+
+  * **Optimized for UI**:
+  Develop with a programming language specialized around the needs of user interface creation
+  
+  * **Productive**:
+  Make changes iteratively: use hot reload to see the result instantly in your running app
+  
+  * **Fast on all platforms**:
+  Compile to ARM & x64 machine code for mobile,  desktop, and backend. Or compile to JavaScript for the web
+
+Dart has flexible compiler technology lets you run Dart code in different ways,
+depending on your target platform and goals:
+
+  * **Dart Native**: For programs targeting devices (mobile, desktop, server, and more),
+  Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an
+  AOT (ahead-of-time) compiler for producing machine code.
+  
+  * **Dart Web**: For programs targeting the web, Dart Web includes both a development time
+  compiler (dartdevc) and a production time compiler (dart2js).  
+
+![Dart platforms illustration](https://dart.dev/assets/platforms-7f4d540acf9fe801b456ad74f9f855230a385014d05d9f5997c878b889a67a0f.svg)
+
+## License & patents
+
+Dart is free and open source.
+
+See [LICENSE][license] and [PATENTS][patents].
 
 ## Using Dart
 
-Visit the [dartlang.org][website] to learn more about the
+Visit the [dart.dev][website] to learn more about the
 [language][lang], [tools][tools],
 [getting started][codelab], and more.
 
-Browse [pub.dartlang.org][pubsite] for more packages and libraries contributed
+Browse [pub.dev][pubsite] for more packages and libraries contributed
 by the community and the Dart team.
 
 ## Building Dart
@@ -26,11 +54,7 @@
 
 You can also contribute patches, as described in [Contributing][contrib].
 
-## License & patents
-
-See [LICENSE][license] and [PATENTS][patents].
-
-[website]: https://www.dartlang.org
+[website]: https://dart.dev
 [license]: https://github.com/dart-lang/sdk/blob/master/LICENSE
 [repo]: https://github.com/dart-lang/sdk
 [lang]: https://www.dartlang.org/docs/dart-up-and-running/ch02.html
@@ -38,6 +62,5 @@
 [codelab]: https://www.dartlang.org/codelabs/darrrt/
 [dartbug]: http://dartbug.com
 [contrib]: https://github.com/dart-lang/sdk/wiki/Contributing
-[pubsite]: https://pub.dartlang.org
+[pubsite]: https://pub.dev
 [patents]: https://github.com/dart-lang/sdk/blob/master/PATENTS
-