"Google has unveiled a tool that will allow users to customise and refine their search queries. The company's SearchWiki lets users re-order, remove or add specific web search results.

This means the next time they perform the same search, the personalised version will pop up. "I would call this revolutionary. It's a huge step, not a baby step in the world of search," Google's product manager, Cedric Dupont, told the BBC.

"This is part of an obvious movement of the web to become more participatory, so Google search is adapting to this movement," he said.

"The SearchWiki is about giving users more control over their search results and increasing user happiness," Mr Dupont added.

But industry watchers predict one huge problem with the effort. "Most people are not going to engage with it and think about where the results should be - if it's above this one or below that one," said Greg Sterling, an editor with SearchEngineLand.com.

"This is really for a motivated or elite core of user who really wants to participate in the process."

As well as ranking results, SearchWiki allows users who have logged in to their Google account to write comments which will have a dialogue balloon next to the result when they return for any further searches.

These will also be public so that others using SearchWiki can view them and get feedback on a website."