Do You Know What's SEO ?
What is Google?
Google started in 1998 when Sergey Brin and Larry Page, two Ph.D. students
from Stanford were working on a project to create a search engine ranking
system. They developed a system that ranks pages in terms of their
‘importance’. This patented ‘PageRank’ technology is the driving force behind
Google’s rise to search engine dominance. Letting a few friends use the site in
beta mode, more and more people started to use Google until 10,000 search queries were being answered
per day. Today, Google answers more than 200 million search queries a day, indexing over 3 billion
webpages.
There are three major types of search engines ‘spider’ or ‘crawler’ engines, directories and hybrids. Google
is a crawler-based engine
Crawler Search Engines
A crawler search engine, like Google, ‘crawls’ or ‘spiders’ through your website and all its related links.
This means that the spider will visit your website then read all the pages and follow all the links. Spiders usually return to your website every month or so to look for changes. Everything the spider finds goes into an index.
The index is like a large catalogue containing a copy of every webpage the spiders find in cyberspace. If
your webpage changes, then the spider should find this change and update the index. When you type in a
keyword or phrase into a crawler-based search engine the search engine software sifts through the millions
of pages stored in the index and gives you the results it believes is most relevant to your search query.
Most crawler-based search engines work in this way with minor changes to software, indexing, etc. That is
why if you type the same query into different search engines you can get varied results.
Directories
Directories differ from crawler-based search engines in that you, as a webmaster, submit a short description
about your site, which is then categorised by humans. Search results are based on what is in the
description about your site.
Hybrids
Hybrid search engines are a combination of the two types of search engines listed above
SEO
(Search engine Optimization)
What is Google?
Google started in 1998 when Sergey Brin and Larry Page, two Ph.D. students
from Stanford were working on a project to create a search engine ranking
system. They developed a system that ranks pages in terms of their
‘importance’. This patented ‘PageRank’ technology is the driving force behind
Google’s rise to search engine dominance. Letting a few friends use the site in
beta mode, more and more people started to use Google until 10,000 search queries were being answered
per day. Today, Google answers more than 200 million search queries a day, indexing over 3 billion
webpages.
There are three major types of search engines ‘spider’ or ‘crawler’ engines, directories and hybrids. Google
is a crawler-based engine
Crawler Search Engines
A crawler search engine, like Google, ‘crawls’ or ‘spiders’ through your website and all its related links.
This means that the spider will visit your website then read all the pages and follow all the links. Spiders usually return to your website every month or so to look for changes. Everything the spider finds goes into an index.
The index is like a large catalogue containing a copy of every webpage the spiders find in cyberspace. If
your webpage changes, then the spider should find this change and update the index. When you type in a
keyword or phrase into a crawler-based search engine the search engine software sifts through the millions
of pages stored in the index and gives you the results it believes is most relevant to your search query.
Most crawler-based search engines work in this way with minor changes to software, indexing, etc. That is
why if you type the same query into different search engines you can get varied results.
Directories
Directories differ from crawler-based search engines in that you, as a webmaster, submit a short description
about your site, which is then categorised by humans. Search results are based on what is in the
description about your site.
Hybrids
Hybrid search engines are a combination of the two types of search engines listed above
SEO
(Search engine Optimization)
Do You Know What's SEO ?
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