I tried to add keywords in app description like this-
keyword,keyword,keyword,keyword ...
But they rejected my app to publish in google play store.
Showing that there is issue with your app
Your app contains content that doesn’t comply with the Metadata policy.
Specifically:
The app title or description does not accurately describe the app’s functionality.
Issue details
We found an issue in the following area(s):
Full description (en_US): keyword,keyword....