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Showing posts from June, 2012

Difference Between Indexing and Caching

Indexing is a process to make a webpage searchable on search engine whereas the process of caching refers to providing a reprinting content snapshot. For example, if we uploaded a new website, then first of all search engine crawler will read the site and after that, it will store all its contents in its Index Data Base in a different format (by giving priority to the h1, h2, or bold, title, meta tags etc.), it will not place content as it was published. As a result, the site will appear in search results for optimized keywords. Google also takes a snapshot of each page on a website and stores it in a different data base which is known as cache data base. If you click on the “Cached” link, you will see the web page as it looked when we indexed it. while, Google creates the index and the database of documents that it accesses when processing a query.

Search Engine Optimization

Search engine optimization (SEO) is the process of improving the visibility of a website or a web page in search engines via the “natural” or un-paid (“organic” or “algorithmic”) search results. Other forms of search engine marketing (SEM) target paid listings. In general, the earlier (or higher on the page), and more frequently a site appears in the search results list, the more visitors it will receive from the search engine’s users. Search engine optimizers may offer SEO as a stand-alone service or as a part of a broader marketing campaign. Because effective SEO may require changes to the HTML source code of a site and site content, SEO tactics may be incorporated into website development and design.

History of Search Engines

In 1957, after the U.S.S.R. launched Sputnik (the first artificial earth satellite), the United States created the Advanced Research Projects Agency (ARPA) as a part of the Department of Defense. Its purpose was to establish U.S. leadership in science and technology applicable to the military. Part of ARPA’s work was to prepare a plan for the United States to maintain control over its missiles and bombers after a nuclear attack. Through this work the ARPANET — a.k.a. the Internet — was born. The first ARPANET connections were made in 1969 and in October 1972 ARPANET went ‘public.’ Almost 20 years after the creation of the Internet, the World Wide Web was born to allow the public exchange of information on a global basis. It was built on the backbone of the Internet. According to Tim Berners-Lee, creator of the World Wide Web, “The Internet is a network of networks. Basically it is made from computers and cables. The World Wide Web is an abstract imaginary space of information. On t