What is a Search Engine?
Search Engines are programs that search documents for specified keywords and returns a list of the documents where the keyword was found. There are 4 types of search engine. A search engine is really a general class of programs, however, the term is often used to specifically describe systems like Google Bing and Yandex. Search Engines are the systems designed to search for information on the World Wide Web.
Search Engine Result Pages(SERP)
The search results are generally listed one after the other on the web pages commonly termed as Search Engine Result Pages (SERP). This is in the form of web pages, images, video, maps and some other types of files. Search Engines algorithm identify the searched keyword or characters specified by the user.
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What was the very first search engine?
The very first search engine was Archie created in 1990 by Alan Ematage, a student at McGill University in Montreal.
Different between Browsers and Search Engines?
At present, there are many browsers such as Internet Explorer, Chrome, Firefox, Safari, and Opera, etc. A browser is used to access various websites and search pages. A search engine is also a program that searches for some particular keyword when specific keywords are entered. … Google and Yahoo are the most popular search engines.
A browser is a place where we search for anything access to various websites and many more. Search engines take the query from the browser and search the whole database and show the exact page what users want.
Top 12 search engines are:-
Types of Search Engines:
- Crawler-Based Search Engine
- Human-Powered Directories
- Hybrid Search Engines
- Meta-Search Engines
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Crawler-Based Search Engine
Crawler-Bad Search Engine, such as Google and Alta Vista, create their listings automatically by using a piece of algorithms to ” crawl” “spider” the whole web and then index what it finds to build the search base. Web page changes can be dynamically caught by crawler-based search engine and will affect how these web pages get listed in search results.
Crawler-based search engines are good when you have a specific search topic in mind and can be very efficient in finding relevant information in this situation. However, when the search topic is general, crawler-based search engines may return hundreds of thousands of irrelevant responses to simple search requests, including lengthy documents in which your keyword appears only once.
Human-powered directories, such as the Yahoo Directory, Open Directory and LookSmart, depend on human editors to create their listings. Typically, webmasters submit a short description to the directory for their websites, or editors write one for the sites they review, and these manually edited descriptions will form the search base. Therefore, changes made to individual web pages will have no effect on how these pages get listed in the search results.
When you are interested in the general topic of search Human-powered directories are good. Human-powered directories help you to narrow down the search term and get refined results.
Therefore, search results found in a human-powered directory are usually more relevant to the search topic and more accurate. However, this is not an efficient way to find information when a specific search topic is in mind.
Hybrid Search Engines
Hybrid search engines use a combination of both crawler-based results and human-powered directories. Now a day many search engines are moving to a hybrid-based search engine.
Yahoo and MSN Search are an example of hybrid-based search engines.
Meta-search engines, such as Metacrawler, a transmit user-supplied keywords simultaneously to several individual search engines to actually carry out the search.
Search results returned from all search engines can be integrated, eliminating duplicates, and additional results such as clustering by topics within search results can be implemented by meta-search engines.
In short, Metasearch takes the results from all the other search engines results, and combine them into one large listing.
Meta-search engines are good for saving time by searching only in one place and sparing the need to use and learn several separate search engines. “But since meta-search engines do not allow for input of many search variables, their best use is to find hits on obscure items or to see if something can be found using the internet.
What is the best search engine in the world?
Crawler-based search engines are the best search engines in the world, according to me.
It creates their listing automatically by using a spider or crawlers.
Crawler caught any kind of changes that you make in the web pages.
So no doubt Google is a crawler-based search engine, and it is one of the best search engines in the world.
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