THE INTERNET ENVIRONMENT 1 - SEARCH ENGINE - MEANING, EXAMPLES, WORKING PRINCIPLES , AND USES (JS3 NOTES)

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THE INTERNET ENVIRONMENT 1 

SEARCH ENGINE 

MEANING, EXAMPLES, WORKING PRINCIPLES OF SEARCH ENGINE , AND USES

OBJECTIVE

1. Define search engine

2. List the examples of search engine

3. Describe how search engines work.

4. State the uses of search engine



MEANING OF SEARCH ENGINE

A web search engine is a software system that is designed to search for information on the World Wide Web (database) through a computer/mobile phone. 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 web pages, images, and other types of files.

EXAMPLES OF SEARCH ENGINE

Common Examples of Search engines are:

i. Google.com
ii.  Mama.com  
iii. Ask.com
iv. Yahoo.com
v. Askjeeves.com
VI. Lycos.com
vii. Safari.com 

viii. Duckduckgo

ix. SearchGPT

x. Bing.com

xi. Gemini e.t.c

HOW DO SEARCH ENGINE WORKS ?

Google search takes place in the following stages:

(i) Crawling

(ii) Indexing

(iii) Searching and Ranking

(i) Crawling: Crawlers discover what pages exist on the web. It is also known as  url (uniform resource locator) discovery.

(ii) Indexing: After a page is crawled, the textual content is processed, analyzed and tagged.

(iii) Searching and Ranking : When a user enters a query(question), the search engine searches the index for matching pages and return the relevant results.



USES OF SEARCH ENGINES

Search Engines can be used to:
·       Easily find and download information on any topic.
·       Get definition of words, acronyms etc.
·       Carry out research.
·       Used to find images, pictures and sound.
·       Search for information about people, places and product.

  •  For shopping and entertainment
  • Download applications from the internet


CLASS ACTIVITIES

1. Define Search engine

2. List four types of search engine

3. State four (4) uses of search engine

4. Search for any four information of your choice and record the results on each information.




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