Retrieved December 10, Because Google is the most popular search engine, many webmasters attempt to influence their website's Google rankings. The Washington Post. Hashtag search links were also supported, as were "promoted" tweets hosted by Twitter located persistently on top of the river and thumbnails of retweeted image or video links.
When using a search engine through a browser program on a computer, search terms and other information may be stored on the computer by default, unless the browser is set not to do this, or they are erased. Retrieved July 25, Category Portal. In August , Danny Sullivan from Google announced a broad core algorithm update.