Press service is typically a department within an organizaton of some kind whose function is to communicate with mass media

Mass media

Mass media refers collectively to all media technologies which are intended to reach a large audience via mass communication. Broadcast media transmit their information electronically and comprise of television, film and radio, movies, CDs, DVDs and some other gadgets like cameras or video consoles...

 on topics related to that organization by issuing press releases and using other various means such as public speeches at news conferences

News conference

A news conference or press conference is a media event in which newsmakers invite journalists to hear them speak and, most often, ask questions. A joint press conference instead is held between two or more talking sides.-Practice:...

, answering questions by telephone or on the Internet

Internet

The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite to serve billions of users worldwide...

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The main (sometimes only) public figure who makes announcements is usually called a press secretary

Press secretary

A press secretary or press officer is a senior advisor who provides advice on how to deal with the news media and, using news management techniques, helps their employer to maintain a positive public image and avoid negative media coverage....

, press officer or spokesperson.

E. g. there is a press service for the European Parliament

European Parliament

The European Parliament is the directly elected parliamentary institution of the European Union . Together with the Council of the European Union and the Commission, it exercises the legislative function of the EU and it has been described as one of the most powerful legislatures in the world...

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See also

• Press secretary
  Press secretary
  A press secretary or press officer is a senior advisor who provides advice on how to deal with the news media and, using news management techniques, helps their employer to maintain a positive public image and avoid negative media coverage....
  
  
• Press release
• White House Press Secretary
  White House Press Secretary
  The White House Press Secretary is a senior White House official whose primary responsibility is to act as spokesperson for the government administration....
  
  
• Public relations
  Public relations
  Public relations is the actions of a corporation, store, government, individual, etc., in promoting goodwill between itself and the public, the community, employees, customers, etc....
  
  
• Spokesperson