Definition^^

1.TRACKBACK
A trackback is one of three types of Linkbacks, methods for Web authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking, and so referring, to their articles. Some weblog software programs, such as Wordpress, Movable Type, Typo and Community Server, support automatic pingbacks where all the links in a published article can be pinged when the article is published. The term is used colloquially for any kind of Linkback.

2.DIGG
Digg is a community-based news article popularity website. It combines social bookmarking, blogging, and syndication with a form of non-hierarchical, democratic editorial control.

News stories and websites are submitted by users, and then promoted to the front page through a user-based ranking system. This differs from the hierarchical editorial system that many other news sites employ.

Readers can view all of the stories that have been submitted by fellow users in the "digg/News/Upcoming" section of the site. Once a story has received enough "diggs", it appears on Digg's front page. Should the story not receive enough diggs, or if enough users report a problem with the submission, the story will remain in the "digg all" area, where it may eventually be removed.

3.TAG
A tag is a (relevant) keyword or term associated with or assigned to a piece of information (a picture, a geographic map, a blog entry, a video clip etc.), thus describing the item and enabling keyword-based classification and search of information.
Tags are usually chosen informally and personally by item author/creator or by its consumer/viewers/community. Tags are typically used for resources such as computer files, web pages, digital images, and internet bookmarks (both in social bookmarking services, and in the current generation of web browsers - see Flock). For this reason, "tagging" has become associated with the Web 2.0 buzz. Many people associate "tagging" with the idea of the semantic web, however some believe that tagging may not be having a positive effect on the overall drive towards the semantic web. Typically, an item will have one or more tags associated with it.

4.TYPELIST
A typelist is a list of types that is recursively defined as a type followed by a typelist. The end of a typelist is signaled by the appearance of a null_typelist rather than an instantiated typelist. Therefore the head of a typelist is any sort of type (possibly, but not typically, another typelist) and the tail of a typelist is either an instantiated typelist or null_typelist. An empty typelist is represented by null_typelist.

5.BLOGROLL
A list of blogs. A blogger features a list of their favorite blogs in the sidebar of their blog.

6.MASHUP
Mashup (digital), a digital media file containing any or all of text, graphics, audio, video, and animation, which recombines and modifies existing digital works to create a derivative work.

Mashup (music), the musical genre encompassing songs which consist entirely of parts of other songs.

Mashup (video), a video that is edited from more than one source to appear as one.

Mashup (web application hybrid), a web application that combines data and/or functionality from more than one source.

7.DELICIOUS
Del.icio.us (pronounced as "delicious") is a social bookmarking web service for storing, sharing, and discovering web bookmarks. The site was founded by Joshua Schachter in late 2003, and was acquired by Yahoo! in 2005. Now it has more than three million users and 100 million bookmarked URLs.

8.SOCIAL MEDIA
Social media is an umbrella term that defines the various activities that integrate technology, social interaction, and the construction of words and pictures. This interaction, and the manner in which information is presented, depends on the varied perspectives and "building" of shared meaning, as people share their stories, and understandings.

Social media use the “wisdom of crowds” to connect information in a collaborative manner. Social media can take many different forms, including Internet forums, message boards, weblogs, wikis, podcasts, pictures and video. Technologies such as blogs, picture-sharing, vlogs, wall-postings, email, instant messaging, music-sharing, group creation and voice over IP, to name a few. Examples of social media applications are Google (reference, social networking), Wikipedia (reference), MySpace (social networking), Facebook (social networking), Last.fm (personal music), YouTube (social networking and video sharing), Second Life (virtual reality), and Flickr (photo sharing).

9.SOCIAL BOOKMARKING
Social bookmarking is a method for Internet users to store, organize, search, and manage bookmarks of web pages on the Internet with the help of metadata.

In a social bookmarking system, users save links to web pages that they want to remember and/or share. These bookmarks are usually public, and can be saved privately, shared only with specified people or groups, shared only inside certain networks, or another combination of public and private domains. The allowed people can usually view these bookmarks chronologically, by category or tags, or via a search engine.

10.SOCIAL MEDIA OPTIMIZATION (SMO)
Social media optimization (SMO) is a set of methods for generating publicity through social media, online communities and community websites. Methods of SMO include adding RSS feeds, adding a "Digg This" button, blogging and incorporating third party community functionalities like Flickr photo slides and galleries or YouTube videos. Social media optimization is a form of search engine marketing.

Social media optimization is in many ways connected as a technique to viral marketing where word of mouth is created not through friends or family but through the use of networking in social bookmarking, video and photo sharing websites. In a similar way the engagement with blogs achieves the same by sharing content through the use of RSS in the blogsphere and special blog search engines such as Technorati.