Most scientific articles start with an abstract or a summary briefly outlining the content of the article. Also, larger university assignments often require an abstract. Read more in the academic regulations for your programme.
The recommendations for where the abstract should go vary from programme to programme. The abstract can be placed at the beginning of the assignment, or at the end. Ask your teacher.
is a summary of the purpose, method, main points, conclusion and perspectives of an assignment.
can be written in Danish or English. See your academic regulations, or ask your supervisor.
is brief, usually not more than one page. Read more in the academic regulations for your programme.
contains formal information about the assignment (title, author, publication institution and year).
is a requirement for the Bachelor's project and Master's thesis, but not usually for other assignments.
An abstract gives your reader a quick overview of the topic, even if he or she is not an expert. Also, it enables the reader to decide whether the assignment is relevant for them.
Different referencing systems provide specific guidance on how to write an abstract. See, for example: the APA style or the MLA style, https://library.au.dk/en/students/reference-management.