I - SEARCH ENGINES
Advantages:
o The first and foremost advantage is that it helps you in increasing the traffic to your website via various search-engines by improving the visibility of your website to the public.
o The other big advantage with search-engine-optimization is that you need not spend any of your valuable money to improve the traffic to your website; after all organic SEO is the best way of obtaining a permanent and long standing website. So, I consider this as the biggest advantage with search engine optimization. You earn without spending. In short, SEO is more affordable than any other means of improving website traffic.
Disadvantages:
o The biggest disadvantage is that only technical geeks can have the mastery over this. The concept of search engine optimization is to provide the relevant topics to the user who types in the particular word/phrase/sentence. So the owner of the website must be clever and capable enough to understand these things and move accordingly. He/she has to out think the public and create keywords that are used frequently by most users.
http://ezinearticles.com/?Advantages-and-Disadvantages-of-Search-Engine-Optimization&id=3667244
II - INDIVIDUAL SEARCH ENGINES AND META SEARCH ENGINES
Both are search tools/software.
However
individual search engine
searches for a topic of your choice and returns matches. Search engine is often used synonymously with spider and index. A spider or web crawler is the software that scans documents and adds them to a search engine's index by following links, examples:
searches for a topic of your choice and returns matches. Search engine is often used synonymously with spider and index. A spider or web crawler is the software that scans documents and adds them to a search engine's index by following links, examples:
- Yahoo
- Bing - (Formerly MSN Live)
- Google Scholar
- AOL Search
- Ask
while;
meta search engines
These search engines are useful if you need to run a comprehensive search quickly across a number of different engines, to compare results or to suggest search engines that you may not have tried before. The majority do a Google, Yahoo, MSN, Ask search (GYMA, or GYM search depending), but there are differences./ It sends user requests to several other search engines and/or databases and aggregates the results into a single list or displays them according to their source. Metasearch engines enable users to enter search criteria once and access several search engines simultaneously. Metasearch engines operate on the premise that the Web is too large for any one search engine to index it all and that more comprehensive search results can be obtained by combining the results from several search engines.
These search engines are useful if you need to run a comprehensive search quickly across a number of different engines, to compare results or to suggest search engines that you may not have tried before. The majority do a Google, Yahoo, MSN, Ask search (GYMA, or GYM search depending), but there are differences./ It sends user requests to several other search engines and/or databases and aggregates the results into a single list or displays them according to their source. Metasearch engines enable users to enter search criteria once and access several search engines simultaneously. Metasearch engines operate on the premise that the Web is too large for any one search engine to index it all and that more comprehensive search results can be obtained by combining the results from several search engines.
examples:
- Brainboost
- ChunkIt!
- Clusty
- Dogpile
- Excite
- Harvester42
- HotBot
- Info.com
- Ixquick
- Kayak
- LeapFish
- Mamma
- Metacrawler
http://en.wikipedia.org/wiki/Metasearch_engine
http://www.mesacc.edu/library/engines.html
III - When to use:
*Search Engine
You know what you're looking for, and can describe it with some key words or phrases.
Google is always a good bet, since it has the largest index
Yahoo Search is the second most popular keyword search engine
Bing may provide results if the other two don't work
Exalead is an excellent choice and makes a change from the big 3
*Search/Subject Directory
These search engines arrange data in hierachies from broad to narrow.
Good if you need an overview of a subject or you're not entirely sure of what you want.
Yahoo Directory provides 14 main categories
Google Directory provides access to 16 main categories
Virtual libraries from Pinakes. Drill down for the content/sites you need
The Open Directory Project provides access to 16 main categories.
Yahoo Directory provides 14 main categories
Google Directory provides access to 16 main categories
Virtual libraries from Pinakes. Drill down for the content/sites you need
The Open Directory Project provides access to 16 main categories.
A subject directory is a catalog of sites collected and organized by humans.Subject directories are often called subject "trees" because they start with a few main categories and then branch out into subcategories, topics, and subtopics.
To find the homepage for the Atlanta Braves at Yahoo!, for example, select "Recreation & Sports" at the top level, "Sports" at the next level, "Baseball" at the third level, "Major League Baseball" at the fourth level, "Teams" at the fifth level, then finally "Atlanta Braves."
http://www.philb.com/whichengine.htm
http://www.learnwebskills.com/search/subject.html
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