Public relations (PR) is the practice of managing the flow of information between an organization and its publics. Public relations provides an organization or individual exposure to their audiences using topics of public interest and news items that do not require direct payment. wikipedia.org

Web content is the textual, visual or aural content that is encountered as part of the user experience on websites. It may include, among other things: text, images, sounds, videos and animations.

Integrated marketing communications (IMC) is an expansion of modern and traditional marketing strategies, to optimize the communication of a consistent message conveying the company's brands to stakeholders. wikipedia.org

Social media marketing refers to the process of gaining traffic or attention through social media sites. wikipedia.org