Intro to ICT Lecture - 2.1 (Search engines).pptx

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1. Introduction to ICT Lecture – 3 .1 (Search Engines) M. Waleed Zaffer

2. What is a Search engine? A search engine is a computer program that helps you find information on the internet. It works by crawling through billions of web pages, indexing the content, and then returning relevant results based on your search query .

3. Search Engines: Examples Google: The most widely used search engine in the world. Bing: Microsoft's search engine. Yahoo: A popular search engine that also offers other services like email and news. DuckDuckGo: A privacy-focused search engine that doesn't track your search history and let’s you surf the deep web.

4. Be thoughtful Begin with a simple query Be precise Avoid redundant and unnecessary terms Break down your query into smaller parts How to use search effectively

5. Watch your words Every word is meaningful Terms Matters Order Matters Google does not care about: Spelling Punctuation Capitalization How to use search effectively

6. Observe domain names .com, . gov , .dev, . edu , etc. can help you determine the authenticity of the source Think critically Don’t blindly trust something on a forum See when content was written and where its from Find several perspectives How to use search effectively

7. Observe domain names .com, . gov , .dev, . edu , etc. can help you determine the authenticity of the source Think critically Don’t blindly trust something on a forum See when content was written and where its from Find several perspectives How to use search effectively

8. What are search operators? Search operators are special words or symbols that you can use to refine your search queries and get more specific results. They help you narrow down your search to find exactly what you're looking for.

9. Search Operators: Examples AND: This operator requires both terms to appear in the results. For example, "dogs AND cats" will only show results that contain both "dogs" and "cats.“ OR: This operator requires either term to appear in the results. For example, "dogs OR cats" will show results that contain either "dogs" or "cats" (or both). NOT: This operator excludes a term from the results. For example, "dogs NOT cats" will show results that contain "dogs" but not "cats.“ +: This operator requires a term to be included in the results. For example, "+dogs" will only show results that contain "dogs."

10. Search Operators: Examples -: This operator excludes a term from the results. For example, "-cats" will exclude results that contain "cats.“ *: This operator is a wildcard that can replace any number of characters. For example, "dog" will show results that contain "dog," "dogs," "doggy," etc. " ": This operator requires a phrase to be searched as an exact match. For example, "search engine optimization" will only show results that contain the exact phrase "search engine optimization."

11. Search Operators: Examples Before: his operator searches for results that were published or created before a specific date. For example, "dogs before: 2023" will find articles about dogs that were published before 2023. After: This operator searches for results that were published or created after a specific date. For example, "dogs after: 2023" will find articles about dogs that were published after 2023.

12. Search Operators: Examples between: This operator searches for results that were published or created within a specific date range. For example, "dogs between: 2022 and 2023" will find articles about dogs that were published between 2022 and 2023. in: This operator can be used to specify a specific year or month. For example, "dogs in: 2023" will find articles about dogs that were published in 2023.

13. Search Operators: Examples site: This is the most common site operator. You use it followed by a colon and then the website address. For example, to search for articles about cats on Wikipedia, you would use: site:wikipedia.org cats filetype: You use this followed by a colon and then the file extension. For example, to find PowerPoint presentations about dogs, you would use: filetype:pdf javascript