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query spaceNoun phrase. The collection of all queries and their relevant results for a set of related search expressions. eConsultancy uses an SEO treemap to depict performance within query spaces.
local searchA type of search that allows users to search in a specific geographic area against an established index of local business listings.
href and a hrefHref, short for Hyperlink Reference, is an attribute of the anchor tag or what we know as a link. The href specifies the source where the anchor tag should point to. It can be internal (your own website) or external (another website), relative (/page/) or absolute (www.site.com/page). A full anchor tag with href also contains an anchor text and would look something like this: anchor text.
volatilityA way to measure a tendency towards change or unpredictability. In relation to search engines, high volatility means there is a high amount of change occurring in the search results. Low volatility means that there is general stability.
localizationNoun. The practice whereby a search engine delivers search results that are deemed relevant to the users location or a specific locale. Localization may be activated algorithmically but some search engines give users the option of resetting their search location after it has been automatically determined (probably by IP address).