How Do Search Engines Work

How Do Search
Engines Work?
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Table Of Content
1. What is a search engine?
2. Crawling
3. Indexing
4.Ranking
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What is a search engine?
A search engine is a set of
programs working together to
search and identify things in a
database that meet specific
criteria. In the World Wide Web,
search engines are used to access
information.
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Crawling
This is the first step a search engine brings
to find websites online. A web crawler is a
program used by Google to develop an
index. This search engine uses web
crawlers or spiders to visit a website, read
it, and follow any links to different
websites. The crawler copies every page on
a website, counting the URL to the index
per time.
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Indexing
The search engine receives and
stores the copies of the webpages
that the crawler created while
crawling in a data center. The
crawler creates the search
engine's index using these copies.
The web crawler crawls and adds
each webpage that appears in
search engine listings to the
index.
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Ranking
In response to a user-submitted
search query, the search engine
presents the most valuable and
relevant reactions in a specific
sequence. Search engines use
algorithms to improve the search
results so that only accurate data
reaches the users. Popular search
engine algorithms like PageRank
are used.
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