Google search in general

 Google Search, commonly referred to as Google Web Search or just Google, is a web search engine owned by Google Inc. It is the most-used search engine on the World Wide Web, handling more than three billion searches each day. As of February 2015 it is the most used search engine in the US with 64.5% market share.  The order of search on Google's search-results pages is based, in part, on a priority rank called a "Page Rank”.  The main purpose of Google Search is to hunt for text in publicly accessible documents offered by web servers, as opposed to other data, such as images or data contained in databases. It was originally developed by Larry Page and Sergey brine in Google Search provides several features beyond searching for words. These include synonyms, weather forecasts, time zones, stock quotes, maps and language translation. introduction

The world wide webweb search engine The World Wide Web is a system of Internet servers that support specially formatted documents. The documents are formatted in a markup language called HTML (Hyper Text Markup Language) that supports links to other documents, as well as graphics, audio, and video files. This means you can jump from one document to another simply by clicking on hot spots. Not all Internet servers are part of the World Wide Web. A web search engine is a software system that is designed to search for information on the World Wide Web. The search results are generally presented in a line of results often referred to as search engine results pages (SERPs). The information may be a mix of web pages, images, and other types of files. Some search engines also mine data available in databases or open directories. Unlike web directories, which are maintained only by human editors.

Information Retrieval  Information Retrieval (IR) is the discipline that deals with retrieval of unstructured data, especially textual documents, in response to a query or topic statement, which may itself be unstructured, EX. a sentence or even another… document, or which may be structured.  IR has grown in importance because of the tremendous explosion in the amount of unstructured data, both internal, corporate document collections, and the immense and growing number of document sources on the Internet.

SPLIT SECOND SEARCH Before you search  The journey of a search query begins long before you type your search into Google. We use software robots, known as web crawlers or spiders, that find web pages to include later in Google search results. Google's software stores data about these pages in data centers. The web is like a book with trillions of pages, and our job is to index that book.

Cont. As you search  When you start your search, that’s when Google’s algorithm begins to find the information you’re looking for.

Cont. Ranking  The algorithm looks at your query and uses over 200 signals to decide which of the millions of pages and content are the most relevant answers for that query.

Cont. Result  Results are ranked in order by relevance and displayed on the page. In addition to showing you results instantly, we also render a preview of those web pages which you can see by hovering on the arrows to the right of the result, so you can quickly decide if it's a site you want to visit.

Map Reduce

Translate Google  Google Translate is a free multilingual statistical machine translation service provided by Google to translate text, speech, images, or real-time video from one language into another. It offers a web interface, mobile interfaces for Android and iOS, and an API that developers can use to build browser extensions, applications and other software. As of November 2015, Google Translate supports 90 languages at various levels and serves over 200 million people daily.

Google driveGmail  Google Drive is a file storage and synchronization service created by Google. It allows users to store files in the cloud, share files, and edit documents, spreadsheets, and presentations with collaborators. Google Drive encompasses Google Docs, Sheets, and Slides, an office suite that permits collaborative editing of documents, spreadsheets, presentations, drawings, forms.  Gmail is a free, advertising- supported service provided by Google. Users may access Gmail as secure webmail, as well as via POP3 or IMAP4 protocols. Gmail initially started as an invitation-only beta release on April 1, 2004[9] and it became available to the general public on February 7, 2007, though still in beta status at that time. The service was upgraded from beta status on July 7, 2009, along with the rest of the Google Apps suite.

Google Maps:Google+  Google Maps is a desktop web mapping service developed by Google. It offers satellite imagery, street maps, 360° panoramic views of streets (Street View), real- time traffic conditions (Google Traffic), and route planning for traveling by foot, car, bicycle (in beta), or public transportation.  Google+ launched in June Features included the ability to post photos and status updates to the stream or interest based communities, group different types of relationships (rather than simply "friends") into Circles, a multi-person instant messaging, text and video chat called Hangouts, events, location tagging, and the ability to edit and upload photos to private cloud-based albums.