An abstract is to a journal article what a teaser trailer is to a film. The abstract is a basic summary that contains all of the most important information about the article in the author's own words. It will usually include several elements including:
Goritz, A., Kolleck, N., & Jörgens, H. (2019). Education for sustainable development and climate change education: The potential of social network analysis based on twitter data. Sustainability, 11(19), 5499. doi:http://dx.doi.org/10.3390/su11195499