Explanation:

In Marketing Cloud Account Engagement, a prospect’s score reflects their level of engagement and is often paired with grading to qualify leads. Scores typically range in letter grades, with A representing the highest level of engagement and F the lowest. However, many organizations also use scores in conjunction with grades, where numerical values drive the score, and the grade (like A, B, C, D, F) reflects how closely a prospect aligns with an ideal customer profile. A+ can sometimes be seen depending on customization, but by default, A is the highest grade, and F is the lowest. Grading helps prioritize follow-up based on quality, not just activity.