It is a mode of syndication in which information or website material including audio-and video-on different pages or web sites is made available to multiple other websites. This distribution of information is done simultaneously. Most commonly, web syndication refers to making use of technology RSS or Atom. Initially, web syndication was utilized for blogs and news sources, but its scope has been expanded with the passage of time. The term “Web syndication” is also used to express other kinds of licensing content of website so that other websites can make us of these information.
The term mash-up is a new sort of web-based applications in which two or more different services are mixed up from unrelated and even competing web sites. This service is used (completely or partially) as sources of information, providing users with new functionality to work. In consequence of such a service may also become a new source of information for other web mash-up services. Hence a network is formed of interrelated services that are integrated with each other.
Key words telling the object in question, or linking it to any category is called tags. These sorts of labels are allocated to the object to ascertain its place among other objects. The concept of labels is strongly related to the concept of folksonomy. Folksonomy is a term which is extensively discussed it in relation with the development of Web 2.0 services like Wink, Flickr, etc