Why "Ask Naver " than "Google it" in South Korea?

There was an article about google and naver in the Economist.

In South Korea, Google have no power.

Korea is called Naverland. (Naver is the biggest portal site on S.Korea)

Google is based on English search engine, so the search result is not accurate and unsatisfactory in Korea.

but Google can easily compete with Chinese search engine Baidu or Japanese search market compare with South Korea.