Mass media are diversified media technologies that are intended to reach a large audience by mass communication. The technologies through which this communication takes place vary. Broadcast media such as radio, recorded music, film, and television transmit their information electronically. Print media use a physical object such as a newspaper, book, pamphlet, or comic, to distribute their information. Outdoor media is a form of mass media that comprises billboards, signs or placards placed inside and outside of commercial buildings, sports stadiums, shops and buses. Other outdoor media include flying billboards (signs in tow of airplanes), blimps, and skywriting. Public speaking and event organizing can also be considered as forms of mass media. The digital media comprises both Internet and mobile mass communication. Internet media provides many mass media services, such as email, websites, blogs, and internet based radio and television. Many other mass media outlets have a presence on the web, by such things as having TV ads that link to a website, or distributing a QR Code in print or outdoor media to direct a mobile user to a website. In this way, they can utilize the easy accessibility that the Internet has, and the outreach that Internet affords, as information can easily be broadcast to many different regions of the world simultaneously and cost-efficiently.
The organizations that control these technologies, such as television stations or publishing companies, are also known as the mass media
Public relations is the art and science of managing communication between an organization and its key publics to build, manage and sustain its positive image.