Finding information by crawling
The web is similar to an ever-growing collection with vast amounts of books no central filing system. We use software known as web crawlers to find publicly available webpages. Crawlers take a look at webpages and follow links on those webpages, much as if you would if you were browsing content on the net. Each goes from connect to hyperlink and bring data about those webpages back again to search engine’s servers.
Organizing information by indexing
When crawlers find a webpage, our systems render the content of the page, just as a browser does. We take note of key signals from keywords to website freshness and we keep track of it all in the Search index.
The Search engine’s index contains hundreds of billions of webpages and is well over 100,000,000 gigabytes in size. It’s like the index in the back of a book with an entry for every word seen on every webpage we index. When we index a webpage, we add it to the entries for all the words it contains.
With the Knowledge Graph, we’re continuing to go beyond keyword matching to better understand the people, places and things you care about. To do this, we not only organize information about webpages but other types of information too. Today, Google Search can help you search text from millions of books from major libraries , find travel times from your local public transit agency, or help you navigate data from public sources like the World Bank.
Search engine bias
Although search engines are programmed to rank websites based on some combination of their popularity and relevancy, empirical studies indicate various political, economic, and interpersonal biases in the information they provide and the underlying assumptions about the technology.
These biases can be a direct result of economic and commercial processes (e.g., companies that advertise with a search engine can become also more popular in its organic search results), and political processes (e.g., the removal of search results to comply with local laws).
For example, Google will not surface certain neo-Nazi websites in France and Germany, where Holocaust denial is illegal.
Biases can also be a result of social processes, as search engine algorithms are frequently designed to exclude non-normative viewpoints in favor of more “popular” results.
Indexing algorithms of major search engines skew towards coverage of U.S.-based sites, rather than websites from non-U.S. countries.
Google Bombing is one example of an attempt to manipulate search results for political, interpersonal or commercial reasons.
Several scholars have studied the cultural changes triggered by search engines, and the representation of certain controversial topics in their results, such as terrorism in Ireland climate change denial and conspiracy theories
Example of search engine
bing.com or duckduckgo.com Let’s take a look at a straightforward analogy: a community library. This is exactly what you’ll generally do when going to a library:
- Look for a search index to check out the name of the book you want.
- Take note of the catalog variety of the book.
- Go directly to the particular section containing the reserve, find the appropriate catalog amount, and get the reserve.
- Let’s compare the library with a web server.
The library is like a web server. It has several sections, which is similar to a web server hosting multiple websites.
The different sections (science, math, history, etc.) in the library are like websites. Each section is like a unique website (two sections do not contain same books).
The books in each section are like webpages. One website may have several webpages, e.g., the Science section (the website) will have books on warmth, sound, thermodynamics, statics, etc. (the webpages). Webpages can each be found at a unique location (URL).
The search index is like the search engine. Each publication has its own unique location in the library (two books cannot be kept at the same place) which is specified by the catalog quantity.
What is Web Page
It is a simple document displayable by an internet browser. Such documents are written in the HTML language (which we look into in more detail in other articles). A web page can embed a variety of different types of resources such as:
- style information controlling a page’s look-and-feel
- scripts which add interactivity to the page
- media images, sounds, and videos.
- Browsers can also display
- other documents such as PDF data files or images, however the term’s
Specifically identifies HTML documents. Usually, we only use the word document All webpages available on the internet are reachable through a distinctive address. To gain access to a full page, just type its address in your web browser address club.A website is an assortment of linked webpages (plus their associated resources) that talk about a unique website name. Each website of confirmed website provides explicit links the majority of the time by means of a clickable part of text which allows the user to go from one web page of the website to another.
To gain access to a website, type its website name in your browser address club, and the browser will screen the website’s main website, or homepage (casually referred as “the house”):
The ideas of the website and a website are specially easy to confuse for a website which has only one website. Such a website may also be called a single-page website.