Article How to write a good abstract for a scientific paper or confe...

https://www.wiley.com/network/researchers/preparing-your-article/how-to-write-a-scientific-abstract

First, you must indicate the reason for writing the research, then indicate the research problem and the goal that you want to reach from the research, then explain the approach that you will follow in writing the research (the research plan)

If you are new and wants to learn how to write a scientific article/ paper

I recommend

https://youtu.be/tGExI7v_PBg

A good abstract should summarize the content of the paper. First, two lines of context, then another two or three on the investigation and discussion. Without forgetting a last line on the conclusions of the study.