What are Search Engines? Technical terms associated with SE Basic Web Search Engine Types of Search Engines Working of Search Engines Directories Crawler based Search Engines SEO
Keyword Search Operators Various search Engines Comparison Searching Technique 10 Do’s and Don’ts while Searching
A search engine is a sophisticated piece of software, accessed through a page on a website that allows you to search the web by entering search queries into a search box. The search engine allows one to ask for content meeting specific criteria and retrieving a list of references that match those criteria. Search engines use regularly updated indexes to operate quickly and efficiently.
Crawling – Follow links to find information Indexing – Record what words appear where Ranking – What information is a good match to a user query?
Displaying – Find a good format for the information Serving – Handle queries, find pages, display results
Gathering Retrieval Search Engine WWW
Directories ď‚ž Crawler-based search engines ď‚ž
Unlike search engines, which use special software to locate and index sites, directories are compiled and maintained by humans. ď‚ž Directories often consist of a categorised list of links to other sites to which you can add your own site. ď‚ž
Crawler-based search engines use sophisticated pieces of software called spiders or robots to search and index web pages These spiders are constantly at work, crawling around the web, locating pages, and taking snapshots of those pages to be cached or stored on the search engine’s servers They are so sophisticated that they can follow links from one page to another and from one site to another
Google is a prominent example of a crawler-based search engine.
Yahoo features both directories and crawler-based search engines . Metadata Metadata Metadata Metadata Metadata
Crawlers collecting data
Technical part of web marketing.
Plus (+) Operator Minus (-) operator Related (~) operator OR operator
Proximity Searching Ability to specify how close within a record multiple terms should be to each other
Phrase Searching Requires terms to be in the exact order specified within the phrase markings. The default standard for identifying phrases is to use double quotes (" ") to surround the phrase.
Do’s Use apt keywords. Use ‘+’ sign while searching for multiple keywords. Use quotes to search for exact phrases on the net. Use specific portals for better results. Practice cross-referencing.
Don’t rely much on sponsored links. Avoid using form words. Check for authenticity of source. Don’t stop at the first page of results . Don’t use just one search engine.
Why can’t we just use a normal search engine?
Specific Subject/project Focus your learners Protect younger learners against possible “bad sites” Act as a knowledge filter Make good sites more accessible Eliminate possible millions of irrelevant results Guide learners towards educator-evaluated web sources
Open your browser
in (or click):
Sign into Google using your
username and password or Register for an account If you already have a Gmail Account you can sign into any Google application with your username and password
Type in the sites that you want to include (1 per line) Select Edition Agree Next
You will be able to edit this list and add more sites later.
You will now be able to share the link to your search engine or you can even embed it on your school/class website or blog
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