Ste

p

1

Database Module

• A graph, with nodes and edges, is constructed as per the links pointing to the other web pages.

Bots give full web pages text to the

indexer.

Stop words like (for, in, at etc) and

punctuation are ignored.

The text is converted to lower

case and stored.

Term Weighting Factor

Term Frequency

How many times the term

occurred in the collected text.

Collection Frequency

Used to discriminate one document from

the other.

Length Normalization

Long documents have larger term

set than short ones.

It is not possible to keep up with the

growth of web and update the content

asap. By the time bot is able to craw

through, its indexed content gets outdated.

So the web has been divided into segments and then the index is

incrementally updated.

Page Rank – Google’s Secret Algorithm

Latest Reputation

Popularity Authority Trustworthy Freshness Relevance

Query Terms

Position Size Proximity

User Content

Geographic Region

Web History

The algorithms get to the deeper

meaning of the words you type in

the search bar.

A search engine identifies and

corrects possible spelling errors and

provides alternatives.

Autocomplete predicts what you

might be searching for. This includes understanding

terms with more than one meaning.

The previous searches help the

engine comprehend what the user might be

looking for.

A lot more goes into displaying the

most relevant results to the user.

Search engines like Google rank based on more

than 200 factors.