Update Readme.md

Readme.md

@@ -1,3 +1,25 @@
 # Pull Request Workflow Cancel
 
-Conserve resources by cancelling workflow runs for previous commits on a pull-request.
+Conserve resources by cancelling workflow runs for previous commits on a pull-request.
+This differs from other "workflow cancelling" actions in that it allows you to cancel multiple workflows at once, and in that it's a javascript action (not a docker action), so it works on macos as well as linux, and executes extremely quickly.
+
+Example usage:
+```yaml
+name: Pull Request Workflow Cancel Example
+on: [pull_request]
+
+jobs:
+  hello:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: khan/pull-request-workflow-cancel@master
+        with:
+          workflows: "example.yml | second.yml"
+        env:
+          GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
+      # Now do whatever other stuff
+      - uses: actions/checkout@v2
+      - run: echo 'Running now'
+      - run: sleep 30
+      - run: echo 'wasnt cancelled'
+```