Miva has announced it is to terminate its advertising contract with Yahoo! in favour of rival search engine Google.

Starting from January 27th, Google will provide search advertising on applications and websites run by the online marketing company's subsidiary Miva Direct as part of a two-year contract.

Greg Sterling, head of Sterling Marketing Intelligence, told MediaPost: "They [Google] have many, many more advertisers and they have more coverage. Yahoo!'s network isn't as extensive and it becomes more challenging to grow."

Financial terms of the deal were not disclosed.

Yahoo! had previously been providing search advertising for Miva since 2001.

Miva claims to provide performance marketing services to its clients, with offices across the United States and Europe.

Last week, Google announced details of two new features for its Search Appliance facility.

Under the service, consumers will be able to assign preference to certain sources and form sub-categories based on results of their searches.