In a press release, your main objective is to promote. Promote whatever facts you are given on a certain event. If the organization you are doing the press release for needs to get volunteers for a certain event, it’s your job to get all your information and release it in a descriptive, creative and eye-catching way so the public will be eager to participate. To hook the intended public, you must look for an incentive to get their volunteering muscles working. The headline needs to grab their attention and the details must be in a order that will have them reading until the end.
Writing a press release is kind of similar to a news article because you do have a headline and you are piling your most important things first. However, in a press release, your main idea is to persuade rather than inform in a news article.