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How Google Search Engine Works
Search Engine Optimization

How Search Engine Works

The great details about Online world and its most visible component, the World Wide Web, is that there are many pages available, waiting to present details about an amazing variety of topic. The bad details about the Online world is that there are many web-pages available, most of them named according to the desire of their author, almost all of them sitting on web servers with mysterious names. When you need to know about a particular subject, how do you know which web-page to read? If you are an average person, you visit an On-line internet search engine.

Internet search engines like Google, Bing & Yahoo are special websites on the Web that are designed to help individuals learn more about other websites. There are variations in the ways various search engines work, but they all perform three basic tasks:
• They look for your search online — or select pieces of the internet– based on important terms.
• They keep an index of the languages they discover, and where they discover them.
• They allow users to look for terms or mixtures of terms found in that catalog.
Early search engines organized a catalog of a few hundred million web pages and records, and obtained maybe one or two million inquiries each day. Today, a top internet search engine will catalog incredible number of web pages, and react to ten million concerns per day. In this article, we’ll tell you how these major projects are conducted, and how Search engines put the items together in order to let you discover more information you need on the Web.

Web Crawling - How Search Engine Works

Before a search engine can tell you where a file or web page is, it must be discovered. To learn more on the large numbers of Web pages that exist, a search engine utilizes special working bots known as spiders, to develop details of the terms discovered on Web sites. When a crawl is building its details, the process is known as Web crawling. (There are some drawbacks to contacting part of the Internet the World Wide Web — a large set of arachnid-centric names for tools is one of them.) In order to develop and maintain a useful list of terms, search engine spiders have to look at a lot at web-pages.

Meta Tags - How Search Engine Works

Meta data allow the person who owns a website to specify keywords and concepts under which the site will be indexed. This can be helpful, especially in cases in which the language of the site might have exponentially increase definitions — the Meta tags can guide the online search engine in choosing which of the several possible definitions for these terms is correct. There is, however, a danger in over-reliance on Meta tags, because a careless or unscrupulous website proprietor might add meta tags that fit very popular topics but have nothing to do with the actual contents of the site. To protect this, spiders will correlate Meta tags with website content, rejecting the Meta tags that don’t match the language of business website.

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All of this assumes that the person who owns a website actually wants it to be included in the results of search engine activities. Many times, the page owner does not want it showing up on all major online search engines, or does not want the activity of a crawler accessing their business site. Consider, for example, an activity that builds new, active web-pages each time sections of the site are displayed or new links are followed. If a Web crawler accesses one of these web-pages, and begins following all of the links for new pages, they could mistake the activity for a high-speed human player and control. To avoid situations like this, the robot exclusion method was developed. This method, implemented in the meta-tag section at the beginning of a Website development, tells a crawler to neither leave the site alone – nor index the content on the site or try to follow its hyperlinks.
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Building Index - How Search Engine Works

Once the robots get useful results of discovering details on Websites (and we should remember that this is a process that is never actually finished — the never stand still characteristics of the Web means that the robots are always crawling), Google must keep details in a way that makes it useful. There are two key elements engaged in making the collected information available to users:
• The details saved with the data
• The methods by which the details are indexed

In the easiest case, an online search engine could just keep phrases and the URL where it was found. Actually, this would make for easier for a search engines restricted use, since there would be no way of informing whether the phrase was used in an important or a simple way on the web page, whether the phrase was used once or many times or whether the web page included hyperlinks to other WebPages containing the phrase. In simple terms, there would be no way of creating the position record that tries offer the most useful web-pages at top of the listing of search engine results.
In simple English, there are many characters that start with phrases, while others begin with fewer words. You’ll discover, for example, that the “M” part of the vocabulary is much wider than the “X” area. This inequity means that discovering a term beginning with a very “popular” correspondence could take much longer than discovering a term that starts with a less well-known one. Indexing spreads out the main distinction, and cuts down generally time it takes to discover an access. It also distinguishes the catalog from the real access. The hash tag contains the hashed number along with a suggestion to the real data, which can be categorized in whatever way allows it to be saved most effectively. The mixture of effective listing and effective storage space makes it possible to get results quickly, even when the consumer makes a complex search.

Building Search - How Search Engine Works

Searching through a catalog includes a user developing a question and posting it through the online search engine. The question can be quite simple, a single word at minimum. Making a more complicated question requires the use of Boolean expressions that allow you to improve and increase the terms of the search engine search phrases (SERP).
AND – All the conditions joined up with “AND” must appear in all webpage’s or records. Some alternative the “+” for the phrase AND.
OR – At least one of the conditions joined up with “OR” must appear in all webpage’s or records.
NOT – The term following “not” shouldn’t appear in all search records.Some search engines alternate the owner “-” for the phrase NOT.
FOLLOWED BY – One of the conditions must be straight followed by the other.
NEAR – One of the conditions must be within a specified number of terms of the other.
Quotation Represents – The term between the quotes are handled as a term, and that term must be found within the papers or data file.

Building Future Searches - How Search Engine Works

The searches based on Boolean operators are actual concerns – search engine looks for the terms or words exactly as they are joined. This could be a problem when entered terms or phrases have multiple meanings. “Flowers,” for example, can be a gift, or a position where flowers are placed, the storage space of a truck or a position where fish lay their eggs. If you’re enthusiastic about only one of these definitions, you might not want to see webpage’s featuring all of the others. You can build a literal search that tries to eliminate unwanted definitions, but it’s nice if Google itself can help out.
One of the areas of search engine research is concept-based searching. Some of the studies involve mathematical analysis on webpage’s containing the terms or words you look for, to find other webpage’s you might be enthusiastic about. Obviously, the information saved about each page is greater for a concept-based search engine, and far more handling is required for a deep look. Still, many groups are working to improve both results and performance of this type of online search engine. Others have progressed to other area of research, called human based language queries.

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Azhar Iqbal

Azhar Iqbal, with more than 15 years of programming experience, posses a firm command over system analysis, system design and custom software solutions. He envisioned utilizing his extensive experience and expertise to elucidate Telephony Applications Development and design more practical solutions. You can reach him through his website or LinkedIn Profile.
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