Google Unveils Search Upgrade

Algorithm codenamed Hummingbird

Google has unveiled an upgrade to the way it interprets users' search requests.

The new algorithm, codenamed Hummingbird, is the first major upgrade for three years.

It has already been in use for about a month, and affects about 90% of Google searches.

At a presentation on Thursday, the search giant was short on specifics but said Hummingbird is especially useful for longer and more complex queries.