Writing an abstract is a skill like any other.
Abstracts are short summaries of your research and, although the format may vary slightly depending on where they are being submitted, there are standard guidelines about what should be in an abstract. The purpose of an abstract is to provide readers a brief summary of your study so that they may determine if they want to learn more about the research. An abstract should use proper terminology but should also be geared toward a reader who may have only a cursory familiarity with the research area.