Search Engine Indexing and PageRank

Search Engine

System that locates resources on the web.

Index

Record of resources on the World Wide Web.

PageRank Algorithm

Method to rank web pages based on relevance.

Larry Page

Co-founder of Google and PageRank algorithm.

Sergey Brin

Co-founder of Google and web technologies innovator.

Web Crawler

Bot that discovers and records web pages.

Hyperlink

Link that connects one web page to another.

Publicly Available Web Pages

Web pages accessible to all internet users.

Search Engine Database

Storage for indexed web page information.

URL

Uniform Resource Locator; web page address.

Resource Quality

Credibility assessment of a web page.

Web Search

Querying the search engine's index for information.

Estimated Web Pages

Trillions of pages exist on the web.

Google's Index Size

Over 100 petabytes of indexed data.

Search Engine Examples

Google, Bing, Yahoo, Baidu.

Crawling Process

Following hyperlinks to discover new web pages.

Last Updated

Timestamp indicating when a resource was modified.

Efficient Resource Location

Search engines streamline finding relevant information.

Information Retrieval

Process of obtaining information from the index.

Web Technologies

Methods and tools for web development and browsing.

Trillions of Pages

Approximate number of web pages on the internet.

Index

Tracks content of each book page.

Search Engine Indexing

Organizes web content for efficient retrieval.

PageRank

Ranks web pages by relevance and usefulness.

Meta Tags

HTML tags describing web page content.

Web Crawlers

Automated programs that index web pages.

Search Term

Keywords entered to retrieve search results.

Inbound Links

Links from other pages to a specific page.

Damping Factor

Probability of reaching a page, usually 0.85.

PageRank Algorithm

Calculates page importance based on links.

PR(A)

PageRank of page A in the algorithm.

C(Ti)

Number of outbound links on page Ti.

PR(Ti)

PageRank of pages linking to page A.

Search Results

List of pages returned by search engines.

Web Browser

Software used to access the internet.

Authoritative Source

Page with higher credibility and relevance.

Algorithm

Set of rules for calculating PageRank.

Relevance Calculation

Determines how search results are ranked.

Search Engine

Tool for finding information on the web.

Web Page

Document accessible via the internet.

Results Listing

Order in which search results are displayed.

Quality of Links

Influences the PageRank of a web page.

Activity Example

Testing search engine functionality with queries.

PageRank

Algorithm assessing webpage relevance in search results.

Indexing

Process of organizing web content for search engines.

Damping factor (d)

Value representing probability of continuing to link.

Initial PageRank

Starting assumption of PageRank value, often 1.

Iteration

Repetitive calculation to refine PageRank values.

Inbound link

Link from another page directing to this page.

Outbound link

Link from this page directing to another page.

Relevance factors

Criteria affecting a webpage's PageRank score.

Domain name relevance

Importance of domain name to search query.

Keyword frequency

How often keywords appear on a webpage.

Page age

Duration since a webpage was created.

Content update frequency

How often the webpage content is refreshed.

Magnitude of updates

Size and significance of content changes.

H1 tags

HTML tags indicating main headings on a page.

PageRank formula

PR(A) = (1-d) + d (PR(Ti)/C(Ti)).

PageRank value

Numerical score indicating webpage importance.

Webpage A

Example page linked to Webpage B.

Webpage B

Example page linked to Webpage A and others.

Page C

Webpage with no outbound links.

Page D

Webpage linking back to Page A.

Final PageRank

Stable PageRank value after multiple iterations.

Search term frequency

How often a search term appears in queries.

Link reciprocity

Mutual linking between two webpages.

PageRank convergence

Point where PageRank values stabilize after iterations.

Search engine result ranking

Order of webpages displayed in search results.

Webpage relevance

Degree to which a webpage matches search intent.

PageRank calculation

Process of determining a page's relevance score.

Total PageRank sum

Combined PageRank values of all pages in scenario.