Augmented reality (AR) is a term for a live direct or an indirect view of a physical, real-world environment whose elements are augmented by computer-generated sensory input, such as sound or graphics. As a result, the technology functions by enhancing one's current perception of reality.

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A blog (a blend of the term web log)is a type of website or part of a website. Blogs are usually maintained by an individual with regular entries of commentary, descriptions of events, or other material such as graphics or video. Entries are commonly displayed in reverse-chronological order. Blog can also be used as a verb, meaning to maintain or add content to a blog.

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Many social networking services, such as Foursquare, Google Latitude, Facebook, Gowalla, and Brightkite allow users to "check in" to a physical place and share their location with their friends. Users can check in to a specific location by text messaging or by using a mobile application on a smartphone--the application will use the phone’s GPS to find the current location. Many applications have a “Places” button or tab where a user can see a list of nearby places into which the user can check in. Once a user has checked in, they have the option of sharing their location with friends in services such as Twitter or Facebook.

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Crowdsourcing is the act of outsourcing tasks, traditionally performed by an employee or contractor, to an undefined, large group of people or community (a "crowd"), through an open call. For example, the public may be invited to develop a new technology, carry out a design task, refine or carry out the steps of an algorithm, or help capture, systematize or analyze large amounts of data.

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A web feed (or news feed) is a data format used for providing users with frequently updated content. Content distributors syndicate a web feed, thereby allowing users to subscribe to it.

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To follow a particular person, topic, feed, or category means to subscribe to content produced from said distribution. In terms of social networks it means to express an interest in the content or entity distributing said content. Often this subscription is manifested in some sort of web Feed comprised of video, text, sound, and/or picture content sorted chronologically.

A user is an agent, either human (end-user) or software, who uses a computer or network service. A user often has a user account and is identified by a username (also user name), screen name (also screenname), nickname (also nick), or handle. Users are also widely characterized as the class of people that use a system without complete technical expertise required to understand the system fully.

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Short messages on services such as Twitter, FriendFeed or identi.ca may be tagged by including one or more hashtags: words or phrases prefixed with a hash symbol (#), with multiple words concatenated, such as those in:

#SocialLeash is the #future

Then, a person can search for the string #SocialLeash or #future and this tagged word will appear in the search engine results. These hashtags also show up in a number of trending topics websites, including Twitter's own front page. Such tags are case-insensitive, with CamelCase often used for readability.

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In online communities (social networking or media sharing portals, e.g on Facebook or YouTube), dedicated visual GUI elements (icons, buttons etc.) provide for users option to like certain persons, groups, pages, status, posts, comments, published links, videos, photos etc., thus displaying their personal attraction, acknowledgement or sympathy with the "liked" object, and this "liked" status will be constantly displayed. Some communities apply a "dislike" option (as opposed to "like"), some even make possible to withdraw one's "like". Latter action is called "unlike". Examples:

• You like this.
• You and 17 other persons like this.
• John Doe likes your link.

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A location-based service (LBS) is an information or entertainment service, accessible with mobile devices through the mobile network and utilizing the ability to make use of the geographical position of the mobile device.

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In Web development, a mashup is a Web page or application that uses and combines data, presentation or functionality from two or more sources to create new services. The term implies easy, fast integration, frequently using open APIs and data sources to produce enriched results that were not necessarily the original reason for producing the raw source data. The main characteristics of the mashup are combination, visualization, and aggregation. It is important to make existing data more useful, moreover for personal and professional use.

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A QR code (short for Quick Response) is a specific matrix barcode (or two-dimensional code), readable by dedicated QR barcode readers and camera phones. The code consists of black modules arranged in a square pattern on a white background. The information encoded can be text, URL or other data.

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Search engine optimization (SEO) is the process of improving the visibility of a website or a web page in search engines via the "natural" or un-paid ("organic" or "algorithmic") search results. Other forms of search engine marketing (SEM) target paid listings. In general, the earlier (or higher on the page), and more frequently a site appears in the search results list, the more visitors it will receive from the search engine's users. SEO may target different kinds of search, including image search, local search, video search, news search and industry-specific vertical search engines. This gives a website web presence.

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Sentiment analysis or opinion mining refers to the application of natural language processing, computational linguistics, and text analytics to identify and extract subjective information in source materials.Generally speaking, sentiment analysis aims to determine the attitude of a speaker or a writer with respect to some topic or the overall tonality of a document. The attitude may be his or her judgment or evaluation (see appraisal theory), affective state (that is to say, the emotional state of the author when writing), or the intended emotional communication (that is to say, the emotional effect the author wishes to have on the reader)

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A smartphone is a mobile phone that offers more advanced computing ability and connectivity than a contemporary feature phone. A smartphone paired with internet connectivity provides mobile access to directions, reviews, pictures, video, and a wealth of other applications.

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One of the key components in successful social media marketing implementation is building "social authority". Social authority is developed when an individual or organization establishes themselves as an "expert" in their given field or area, thereby becoming an influencer in that field or area. It is through this process of "building social authority" that social media becomes effective. That is why one of the foundational concepts in social media has become that you cannot completely control your message through social media but rather you can simply begin to participate in the "conversation" in the hopes that you can become a relevant influence in that conversation.

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A social networking service is an online service, platform, or site that focuses on building and reflecting of social networks or social relations among people, e.g., who share interests and/or activities. A social network service essentially consists of a representation of each user (often a profile), his/her social links, and a variety of additional services. Most social network services are web based and provide means for users to interact over the internet, such as e-mail and instant messaging. Social networking sites allow users to share ideas, activities, events, and interests within their individual networks..

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Social media measurement refers to the tracking of various social media content such as blogs, wikis, micro-blogs, social networking sites, video/photo sharing websites, forums, message boards, and user-generated content in general as a way for marketers to determine the volume and sentiment around a brand or topic in social media.

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A location-based service (LBS) is an information or entertainment service, accessible with mobile devices through the mobile network and utilizing the ability to make use of the geographical position of the mobile device.

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In online computer systems terminology, a tag is a non-hierarchical keyword or term assigned to a piece of information (such as an Internet bookmark, digital image, or computer file). This kind of metadata helps describe an item and allows it to be found again by browsing or searching. Tags are generally chosen informally and personally by the item's creator or by its viewer, depending on the system. Tagging was popularized by websites associated with Web 2.0 and is an important feature of many Web 2.0 services

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A tweet is the term used for a post made on the microblogging platform Twitter. The length of the post is limited to 140 characters including spaces, resulting in the prevalence of hashtags and link-shortening services.

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Viral marketing and viral advertising are buzzwords referring to marketing techniques that use pre-existing social networks to produce increases in brand awareness or to achieve other marketing objectives (such as product sales) through self-replicating viral processes, analogous to the spread of viruses or computer viruses. It can be delivered by word of mouth or enhanced by the network effects of the Internet. Viral promotions may take the form of video clips, interactive Flash games, advergames, ebooks, brandable software, images, or text messages.

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Video blogging, sometimes shortened to vlogging (pronounced 'vlogging', as opposed to 'v-logging) or vidding or vidblogging is a form of blogging for which the medium is video, and is a form of Internet television. Entries often combine embedded video or a video link with supporting text, images, and other metadata. Entries can be recorded in one take or cut into multiple parts. It is also a very popular category on YouTube. Video logs (vlogs) also often take advantage of web syndication to allow for the distribution of video over the Internet using either the RSS or Atom syndication formats, for automatic aggregation and playback on mobile devices and personal computers (See video podcast).

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