please check sample student brief and briefing template pdf may help you understand.
The function of this assignment demonstrates that a student has spent the time to read and think about the course material. An A-range brief typically exceeds 4,000 words and demonstrates originality, clarity, and organization. A B-range brief would range from 2,200 words to 2,700 words, depending on the reading (the number of texts assigned per a class, their length, and difficulty) and the degree to which students merely quote the material instead of paraphrasing it. In both the A and B range, the instructions are clearly followed, the template is used, and the brief is properly formatted making it easy to read
