Learn about the Search Engine functions and How the Search Engine Works. Learn about Crawler Based Search Engine, Human Powered Search Engine and Meta Search Engine!

1. A B R I E F O N S E A R C H E N G I N E T Y P E A N D
K E Y W O R D S E L E C T I O N
B Y A S H O K K U M A R
Search Engine Optimization

2. Major Search Engine
List of Search Engines;
• Google
• Yahoo
• Bing
• Ask.com
• Aol.com
• Looksmart

3. Categories
1. Crawler-based
2. Human-Powered
Directory
3. Meta-search
engines
Crawler Based Search engine
Examples: Google, AllTheWeb
and AltaVista.
Create their listings automatically via
“crawl” or “spider” and index them
into Search Engine data base.
Even they detect the web page changes
automatically and take the corrective
measures in search engine database.

4. Categories
1. Crawler-based
2. Human-Powered
Directory
3. Meta-search
engines
Human-Powered Directory
Example: Yahoo directory, Open
Directory and LookSmart.
Human editors create listings for such
search engines.
Webmasters submit a short description
to the directory for their websites, or
editors write one for the sites they
review, and these manually edited
descriptions will form the search base.

5. Categories
1. Crawler-based
2. Human-Powered
Directory
3. Meta-search
engines
Meta-search engines
Example; Dogpile, Mamma,
and Metacrawler.
Supplied keywords simultaneously to
several individual search engines to
actually carry out the search.
Search results returned from all the search
engines get integrated and duplicates can
be eliminated.
Additional features such as clustering by
subjects within the search results can be
implemented by meta-search engines.

6. Sear Engine List
List of Search Engine
with their Type!
Search Engines Types
Google Crawler-based search engine
AllTheWeb Crawler-based search engine
Teoma Crawler-based search engine
Inktomi Crawler-based search engine
AltaVista Crawler-based search engine
LookSmart Human-Powered Directory
Open Directory Human-Powered Directory
Yahoo
Human-Powered Directory, also provide crawler-based
search results powered byGoogle
MSN Search
Human-Powered Directory powered byLookSmart, also
provide crawler-based search results powered by Inktomi
AOL Search Provide crawler-based search results powered by Google
AskJeeves Provide crawler-based search results powered by Teoma
HotBot
Provide crawler-based search results powered
by AllTheWeb, Google, Inktomiand Teoma, “4-in-1” search
engine
Lycos
Provide crawler-based search results powered
by AllTheWeb
Netscape Search Provide crawler-based search results powered by Google

8. Thank You
W I L L L E A R N A B O U T K E Y W O R D
S E L E C T I O N P R O C E S S
-- aashokkr