Basically, an abstract is a Summary of an entire project work in 300 words or less. It summarizes the entire research project including the topic, objectives, Framework, scope, statistical analysis method, findings and recommendations among others. An abstract is used in research article, thesis, review, conference proceeding or any analysis of a particular subject. Abstract helps the reader to quickly ascertain the paper's purpose, giving insights into the research paper.
Detailed Step to step on how to write an abstract can be found here
https://researchcenta.com/content?id=2