It works similarly to Google Chrome's Personal Blocklist extension.
You can remove google search results on a per hostname/wildcard basis.
Eg, don't like recipes from www.marlenes-cookbook.com?
Simply click the 'block' link in the Google search results and you'll never see her in the search results again!
To unblock/export blocked hosts, open the Opera 'manage extensions' screen, and click the preferences button.
- This extension can modify or add functionality to one or more websites.