Medium is some thing to transfer information from one place to other and from one person to other. It may be a paper or an electronic screen. In case of paper it may be a news paper, a magazine or a book. In case of screen it may be a TV channel, a website or an electronic book. Now screen or electronic media is much more effective than print media. Internet has become a large source of information which is in the form of web pages or blogs. The web pages which only contain information in the form of text or images are called static pages. The web pages which show text or images but retrieve each and every information from a database server are called dynamic pages.

One most popular, most powerful and most attractive example of dynamic website is social media like facebook, twitter, myspace and orkut etc. Facebook is a largest social platform available on internet where one can easily share information. Twitter is a most popular and emerging micro blogging service and is used to share short textual information up to one forty characters.

On facebook you can share information in text, image or video format with your friends. It is a great place to share or discuss ideas with like minded people on different groups. Any one who have an email address can easily join facebook. Now facebook not only an entertainment portal but also a business place where different users can talk or exchange work. On facebook one could easily see advertisement at right column of page. Such type of advertisement is a source to generate revenue for facebook. Many companies have their own pages on face book full of their brand information and they share the link of the page with others for website, blog promotion or marketing purposes. Jenny Anderson, a social media expert said that every facebook user would be a potential customer for a company which accurately know the power of social media (facebook). It would also be a source to get brand reviews and the feedback from the customers. Such data could be used to evaluate the status of a brand in minds of people. Now modern companies has hired social media experts for promotion or marketing of their brands. The responsibility of a social media expert is to design or execute marketing campaign on different online available social media.

Some political parties has used different social media to evaluate their popularity in people. Now in Egypt, different parties has given a call for protest against government by using a popular online community. Such social media would become dangerous when used for political purposes. Now it is impossible to deny the power of social media and social media experts.