Quick AnswerAn abstract is a short, self-contained summary of your entire dissertation, usually 150-300 words. It states your aim, methods, key findings and conclusion, so a reader can understand the essence of your study without reading the full text.
The abstract is short but important: it is often the only part people read before deciding whether to read on. Write it last, once your study is complete. Here is how to summarise everything in one tight paragraph.