검색된 정보 중에서 실제로 관련 있는 정보의 비율
Precision and Sensitivity are in a Trade-off relationship, so we use the F1-score. We use it to find a suitable point where both are high.
Mean Average Precision (MAP)
More weight to the top items, Only binary relevance
Most standard among the TREC community is MAP which provides a single-figure measure of quality across recall levels.
