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Search engine

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Definition and Functionality of Search Engines

– Software system that finds web pages matching a search query
– Systematically searches the World Wide Web for specific information
– Matches textual information provided in a search
– Retrieves relevant web pages based on keywords or phrases
– Provides users with search results in a ranked order

Importance of Search Engines

– Facilitates access to vast amounts of information on the web
– Saves time and effort by quickly retrieving relevant results
– Helps users find specific information or answers to their queries
– Enables users to discover new websites, resources, and knowledge
– Plays a crucial role in online research, navigation, and discovery

Types of Search Engines

– Web search engines: Focus on indexing and retrieving web pages
– Image search engines: Specifically designed for searching images
– Video search engines: Specialized in finding video content
– News search engines: Primarily used for searching news articles
Vertical search engines: Narrowly focused on specific topics or industries

Popular Search Engines

Google: Dominant search engine with a vast index of web pages
– Bing: Microsoft’s search engine, offering web, image, and video search
– Yahoo: Provides web search results powered by Bing
Baidu: Leading search engine in China
Yandex: Popular search engine in Russia

Challenges and Future of Search Engines

– Information overload: Coping with the vast amount of available data
– Spam and low-quality content: Ensuring search results are relevant and reliable
– Mobile optimization: Adapting to the growing use of mobile devices
Voice search: Responding to the increasing popularity of voice assistants
– Artificial intelligence: Enhancing search engines with advanced algorithms

Search engine (Wikipedia)

A search engine is a software system that finds web pages that match a web search. They search the World Wide Web in a systematic way for particular information specified in a textual web search query. The search results are generally presented in a line of results, often referred to as search engine results pages (SERPs). The information may be a mix of hyperlinks to web pages, images, videos, infographics, articles, and other types of files. Some search engines also mine data available in databases or open directories. Unlike web directories and social bookmarking sites, which are maintained by human editors, search engines also maintain real-time information by running an algorithm on a web crawler. Any internet-based content that cannot be indexed and searched by a web search engine falls under the category of deep web. Modern search engines are based on techniques and methods developed in the field of Information retrieval.

The results of a search for the term "lunar eclipse" in a web-based image search engine
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