Working of search engine ppt include contents :What is search engine, Working of search engine, Types of search engine, steps in search engine working,crawling,indexing,ranking .

1. Working of
Search Engine
BY :
Megha Yadav

2. Search Engine
– Search Engine is a website that allows user to find the information on World
Wide Web(www).
– Its an answering machine ,which provide answer or result
(webpages,images,files, pdf and info graphics)of user query.
– It contain huge database of information and complex algorithms to determine the
ranking of website on SERP.

3. How Search Engine works
– When a search query is entered into a Search Engine by a user.
– Search engine sent out bots to find relevant content .
– Bots crawls to discover web pages ,images and other relevant information to be
added to search engine index.
– Now the search engine index contain lot of results for a particular query, now
which result is to select is decided by the search engine ranking algorithms.
– The relevant result is displayed in front of user on SERP .

4. Types of Search Engine

5. Steps of Search Engine Working :
– Crawling
– Indexing
– Ranking
– Retrieving Results

6. Working
of Search
Engine
Crawling
Crawling
Building
An index
Ranking
Search
Results

7. Search Engine Crawling:
– Search engine Crawling is the process by which search engines send crawlers to
discover content on the web, updated content such as new sites or pages, changes
to existing sites, and dead links.
– In Search Engine Crawling, Web Crawlers visit a website captured the data and
store it for indexing.
– Search Engine crawling is done periodically to determine the changes to the
page’s content since the last time it was crawled.

8. Bots (Crawlers)
– Bots (also known as web spider, web robot, web crawlers)are computer
programs which automatically browse the documents on WWW.
– Search engine uses a program Bot. Bots crawl across website to discover new
and updated web page content ,keyword, images and info graphics to be added
to search engine for Indexing.
– When a crawler reviews our site, they follow the rules and structures defined by
our robots.txt file and sitemap. These elements give the crawler instructions for
which pages to look at and which pages to ignore.

9.  Bot browses the WWW for the purpose of Web
Indexing
 Bot crawl the websites to discover webpages ,content
and images.
Web
Crawling

10. Top Search Engine Crawler
– GoogleBot (most popular web crawlers )
– Bingbot
– Slurp Bot
– DuckDuckBot
– Baiduspider
– Yandex Bot

11. Search Engine Indexing
– Search Engine Indexing means organizing the data and create index into the
database in order to provide quick response to search queries.
– Indexing refers to the process of creating index for all the fetched web pages and
keeping them into a database from where it can retrieved later.
– Index contains information of all the websites the search engine was able to
find. If a website is not in a search engine’s index, users will not be able to find it
using that search engine. Search engines regularly update their indexes.

12. How Indexing is done
– Bots crawl the internet and stored the information into the local server for
indexing.
– Raw data is collected into the Local Server .
– Now the indexing is done, in which the data is organized according to categories
of information available into the main server .
– The main server contain categories wise index data.

13. Local Server
Bots store crawl data
Indexer
Category 1 Category2
Main Server
Ranking Algorithms
Fetch Data
Send Data
Query
Result

14. Ranking
– The ordering of search results by most relevant to least relevant to a particular
query is called Ranking.
– This is achieved through the use of search engine Ranking Algorithms
– The algorithm is a very complex which calculates a value for any given site in
relation to a search term. We don’t know what the algorithm actually is, because
search engines tend to keep this secret from competitors and from people looking
to get to the top spots.
– Factors affecting Search Engines rankings:
1) On Page Factors
2) Off Page Factors

15. Page Ranking Algorithms
– Page Rank
– Panda
– Penguin
– Hummingbird

16. Search Results
– Search Engine provide the list of search results with the help of ranking
algorithms to user.
– Search results are off two types:
– Organic Search Results are the Web page listings that most closely match the
user's search query based on relevance.
– Sponsored search results have placed ads with the search engine. These results
are determined by factors like price per click, click-through rates and search
competition.