The press release is a means of informing the press about any change or event related to your activity: new premises, new product, participation in a cultural event, etc. It differs from the press kit, not only by its size (1 to 2 pages) but also by its occasionality. It focuses on what is new, without leaving much room to the general background.
Before its redaction, there will be discussions in order to determine the best angle and to produce a press release which perfectly corresponds to your company's personality.