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Web Site: www.ijettcs.org Email: editor@ijettcs.org, editorijettcs@gmail.com Volume 2, Issue 3, May – June 2013 ISSN 2278-6856 The Role and Importance of Search Engine and Search Engine Optimization Ayush Jain M Tech Scholar, Department of Computer Science and Engineering, Jagan Nath University, Jaipur (Raj.), India Abstract: Search Engines are basically designed for searching the relevant content. Search Engine Optimization is collection of techniques and practices by which any website can increase ranking in search engine. Search Engine Optimization is divided into two parts, first one is on page and second one is off page. This paper describes the role, importance and working of search engine. And also describe about the concept and overview of search engine optimization and its types. Keywords: Crawler, Search Engine, SEO, Website. 1. INTRODUCTION Search engine is a web software program or web based script available over the Internet that searches documents and files for keywords and returns the list of results containing those keywords. Today, there are numbers of different search engines available on the Internet, each with their own techniques and specialties. Search Engine Optimization is a technique to improve visibility of a website in search engine. 2. BACKGROUND In search engine industry Archie was the first search engine, which was used to search for FTP (File Transfer Protocol) files and in the other side the first text based search engine is known as Veronica. Because large search engines contain millions and sometimes billions of pages, many search engines are not only just searching the pages but also display the results depending upon their importance. This importance is commonly determined by using various algorithms. There are currently different types of search engines available like Google, Yahoo, Ask.com, Bing, Alta vista etc. these are displayed in Figure 1. Figure 1: Different Types of Search Engines Volume 2, Issue 3 May – June 2013 In the diagram below, there is a detailed example that, how a search engine works. The working of search engine is divided into two parts first one is crawling and second one is indexing. A Crawler is a program that retrieves web pages, commonly for use by search engines. In Crawling process, spider or crawler visits the pages that will be included in the search and grabs the contents of each of those pages. After the crawling process indexing process is started in database. In short, the working of search engine is basically divided into two parts, first one is crawling and second one is indexing. Often this involves stripping out stop words, grabbing the location of each of the words in the page, the relevancy they occur, back links to other pages, images and so on. This data is used to rank the page and is the primary method of a search engine uses to determine if a page should be shown and in what order. Finally, once the data has been processed it is often broken up into one or more files, moved to different computers or servers, or loaded into memory where it can be accessed when users perform a search[1]. Figure 2: Spider or Crawler Methodology Web Crawlers follow links from one page to another and index the content. It is difficult for crawler to visit a website on regular basis. Sometimes crawlers may not end up visiting the website for a month or two, but now all the search engines like Google is working on real time content update algorithm. The Block Diagram shown below describes the working of Google. Page 99PDF Image | Role and Importance of Search Engine and Search Engine Optimization
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