An abstract is a short and informative outline of your work. It usually includes the following sections

An abstract tells the reader what they need to know to understand the big picture of your project.

An abstract is not a summary. A summary appears at the end of a piece of work, and is a restatement of the important findings and conclusions.

Abstracts are found at the beginning of journal articles, research papers, reports, theses, and dissertations. Abstracts can also be used to describe a talk or poster presentation at a conference.

Adpated from Dr J. Mark Tippett's "How to Write an Abstract"