Google maps not updating
The general idea is to affect Google's relevance algorithm by incorporating the keywords being targeted in various places "on page", in particular the title element and the body copy (note: the higher up in the page, presumably the better its keyword prominence and thus the ranking).
Too many occurrences of the keyword, however, cause the page to look suspect to Google's spam checking algorithms.
Businesses who fail to update their websites accordingly could see a dip in their regular websites traffic.
Despite Google search's immense index, sources generally assume that Google is only indexing less than 5% of the total Internet, with the rest belonging to the Deep web, inaccessible through its search tools.
Competitors of Google include Baidu and in China; and in South Korea; Yandex in Russia; in the Czech Republic; Yahoo in Japan, Taiwan and the US, as well as Bing and Duck Duck Go.