An abstract is a short summary of your completed research. The abstract presents only the essential information about your project. In 250 words or less, it describes the objective (thesis statement), methods, and conclusions of your paper. The wording is direct, with no information repeated. It does not include background information, descriptions of methods, literature reviews, or references to other works.
However, it's important to note that the weight accorded to the different components can vary by discipline. For models, try to find abstracts of research that is similar to your research.
Don’ts of Abstract Writing