 How to disable/remove Report Abuse|Powered By Google Sites in google sites at the bottom of the page. I have used some css attributes. but the sites says those attributes are not permitted.
How to hide powered by google in google sites
google;google sites
You can't.  It violates Google's terms of service which you agreed to in order to create that Google site. If you do not wish to have a powered by link, you can try to use another provider for your website.