When you’re looking for something new on the internet ,a search engine is typically your first stop.We all know how to use a search engine :just type a word ,a phrase ,or the name of a person or place and then click the search button to see hundreds of thousands of links to relevant web pages.But there’s a lot that goes on behind the scenes to sure the Google bots,Bing machines,and Yahoo!droids put what you’re looking for at the top of the results page.Search engines make it their business to read your mind,and you might be surprised by some of their methods
The Specific Of Search
Search engines such as Bing and Google,are composed of multiple parts.The aspect you interact with to type in your queries and nacigate results is little more than a front- end user interface,much like your Desktop is for your KPC’s operating system .Behind that user interface,Web crawlers,or single-purpose applications that fetch data from the web,compile a database of documents by requesting specific pages from web servers all over the Internet, scanning each page for hyperlinks, and then categorizing the results using a numbering system. Speed is a high priority for search engines, so web crawlers tend to start by indexing the most popular web pages first, scouring the most active servers and following every link on those pages.The web search indexes behind search engines use a variety of encoding (converting words into another)and hashing (converting words and characters into an abbreviated alphanumeric value)techniques to translate all the words and links returned by web crawlers into an efficient and fast database that is capable of returning a page of hits in fractions of a second.
Web crawlers are capable of producing incredible volumes of data in a very short period. According to our Google industry source,A lot of web sites,we can index in a second or less But this collection of incomprehensible gobbledygook isn’t searchable unti it’s paired with you perform your search, any page that contains words that match your query has the possibility of showing up in your results list. But your web search doesn’t stop there
The Secret Search Sauce
Every search engine has its own bag of tricks for ranking search results and displaying them in order of relevance. The specifics of these ranking techniques are closely guarded trade secrets and to gice you an idea how important ranking is Google tells us that there are more engineers working on search than on any other product at Google. Google’s page Rank is a fairly well-known relevancy algorithm, which helps rank pages based on how many links the rare to a web page from other pages,and the linking web site’s quality(based on things such as the site’s reliability and the amount of time the site’s has been on the web).In this way, Page Rank looks at the web like it’s a popularity contest, and when a popular site mentions another site, it carries a lot of weight with the Page Rank algorithm.It’s all about the web sites you know.
Another type of algorithm takes note of where in the web page a given word is found. Most algorithms weigh any words found in the title,subtitles,metatags (typically the web designer or web page owner’s details about the contents of the page), and other descriptive locations more heavily .Sometimes, an algorithm purposefully omits words from an index such as ‘a, ‘an,’ and ‘the’ Capitalization and font size are other common factors that can affect how much weight a word might get in an index.These algorithms are the hearts and souls of a search engine ,and the better they are at determining what can be found on a given web page, the jbetter a user’s search results will be.But showing a simple collection of links is not all a modern search engine is capable of doing.
Make The Most Of Your Results
Although Microsoft,Yahoo!and Google are not willilng to reveal the nuts and bolts of their ranking techniques,Google was a lot more forth coming about how it arrives at some of the more transparent results you encounter.For instance, when you type weather into a search engine and press ENTER,you’ll typically see the weather for your area.At Google,they call this a Universal Search Result.Context plays a large role in the results of your search. For instance,where you are,what the data is, and what is going on in your neck of the woods all affect your results .In this way ,a search you perform today will return different results than if you make the same search two weeks from now .And search providers are constantly refining their relevancy formulas and evolving the search engines to help you find exactly what you’re looking for.
Search is an evolving organism.A senior software engineer who works on web search quality at Google tells us that ‘at any given time we’re running between 50 and 200 search experiments,meaning that we’re trying out a tweak to the ranking algorithm or to the appearance of the results and we’re testing the data to see if users are clicking in ways that suggest to us that it is an improvement.” In essence, there are between 50 and 200 versions of Google Search at any given moment; some differ in only minor ways, such as displaying a keyword in bold, indenting a line of text, or changing the ranking of a certain category of queries. Other changes are more dramatic, such as changing the index so that the search engine can return results for queries typed as full sentence. In 2009 alone ,Google launched 550 different improvements to its search engine.
Search seers
Google acknowledges that some searches are easier than other. The searches that are more difficult to produce relevant results on are the completely unique ones. According to Google, the firm’s search e3ngine gets more than 1 billion searches every day. Of those searches, 20% of them haven’t been searched for in the previous 90 days. To a search engine, that’s the equivalent of an alien language. And trying to anticipate those sorts of queries is the equivalent of trying to learn to speak that language before you’ve heard syllable one. “That introduces some interesting challenges, because if you don’t know what people are going to be searching for tomorrow, you have to kinda guess. It’s something we spend a lot of time trying to figure out.”
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