# Algorithm

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# Definition of Algorithm :

A formula used by computers, technolgies or companies  to manipulate and display information. Search engines use Algorithms to construct the search engine results. As an example, Google Hummingbird search engine algorithm update in 2013, directly impacted on how search engine results were served. On the sidelines of the algorithms development, the search engine optimization processes aim to understand, use and control precisely results given by search engines on various keywords queries.

## Algorithm in depth :

When the term algorithm is used in math, it typically refers to a set of steps used to solve a mathematical computation. A step by step procedure is used in long division. A simple question like 73 divided by 3 would have the following algorithm:

How many times does 3 go into 7?
How many are left over? 1
Put the 1(ten) in front of the 3.
How many times does 3 go into 13?
The answer is 4 with a remainder of one.
And of course the answer becomes 24 with a remainder of 1.

The step by step procedure used to do the long division computation is considered a long division algorithm.

Examples: FOIL is another example of an algorithm used in algebra. The steps in FOIL are: First outside, inside last. This algorithm is useful for multiplying polynomials. BEDMAS is another useful set of steps and is also considered a formula. BEDMAS: Brackets, Exponents, Division, Multiplication, Addition and Subtraction. This refers to an order of operations.

Algorithms are about finding efficient ways to do math. A colleague and friend of mine used to always say that ‘mathematicians’ are lazy so they are always looking for short cuts.

You want the answer, not trillions of webpages. Algorithms are computer programs that look for clues to give you back exactly what you want.

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For a typical query, there are thousands, if not millions, of webpages with helpful information. Algorithms are the computer processes and formulas that take your questions and turn them into answers. Today Google’s algorithms rely on more than 200 unique signals or “clues” that make it possible to guess what you might really be looking for. These signals include things like the terms on websites, the freshness of content, your region and PageRank.

## Google algorithms and search projects

There are many components to the search process and the results page, and we’re constantly updating our technologies and systems to deliver better results. Many of these changes involve exciting new innovations, such as the Knowledge Graph or Google Instant. There are other important systems that we constantly tune and refine. This list of projects provides a glimpse into the many different aspects of search.

Displays immediate answers and information for things such as the weather, sports scores and quick facts.

###### Autocomplete

Predicts what you might be searching for. This includes understanding terms with more than one meaning.

###### Books

Finds results out of millions of books, including previews and text, from libraries and publishers worldwide.

###### Freshness

Shows the latest news and information. This includes gathering timely results when you’re searching specific dates.

Displays immediate results as you type.

###### Images

Shows you image-based results with thumbnails so you can decide which page to visit from just a glance.

###### Indexing

Uses systems for collecting and storing documents on the web.

###### Knowledge Graph

Provides results based on a database of real world people, places, things, and the connections between them.

###### Mobile

Includes improvements designed specifically for mobile devices, such as tablets and smartphones.

###### News

Includes results from online newspapers and blogs from around the world.

###### Query Understanding

Gets to the deeper meaning of the words you type.

###### SafeSearch

Reduces the amount of adult web pages, images, and videos in your results.

###### Search Methods

Creates new ways to search, including “search by image” and “voice search.”

###### Site & Page Quality

Uses a set of signals to determine how trustworthy, reputable, or authoritative a source is. (One of these signals is PageRank, one of Google’s first algorithms, which looks at links between pages to determine their relevance.)

###### Snippets

Shows small previews of information, such as a page’s title and short descriptive text, about each search result.

###### Spelling

Identifies and corrects possible spelling errors and provides alternatives.

###### Synonyms

Recognizes words with similar meanings.

###### Translation and Internationalization

Tailors results based on your language and country.

###### Universal Search

Blends relevant content, such as images, news, maps, videos, and your personal content, into a single unified search results page.

###### User Context

Provides more relevant results based on geographic region, Web History, and other factors.

###### Videos

Shows video-based results with thumbnails so you can quickly decide which video to watch.

References :

### Other definitions :

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