Google said on Wednesday it is combining its different Web search services into one "Universal Search" service that will present Web sites, news, video and other results on one page. The move will take effect on Wednesday and be improved over time, according to Google executives.

Universal Search means that standard Google searches will draw results from separate properties covering books, local information, images, news, and video.

The combined search includes any site indexed by Google's services. On the video side, for example, it will include YouTube, Google Video and independent sites like Metacafe.com.

The new service could open the door to more relevant ads on search result pages, which accounted for roughly half of the $10.6 billion in revenue Google did last year.

In addition, the company is introducing new navigation features at the top of every Google page that let users to quickly hop between its different properties.

For example, users of Google's e-mail service, Gmail, can jump instantly to search, calendar, documents, and other services, according to a demonstration at the briefing.

The company also is preparing a translation service that converts queries into other languages. The technique will translate queries in any of a dozen languages into English, find additional search results, then automatically translate those back into the language of the original query.