* GRE Score: This is the raw score you achieve on each section of the GRE (Verbal Reasoning, Quantitative Reasoning, and Analytical Writing). These raw scores are then converted to scaled scores. The scaled scores for Verbal and Quantitative Reasoning range from 130 to 170, in 1-point increments. The Analytical Writing section is scored separately by two raters, each giving a score from 0 to 6, in half-point increments. The final Analytical Writing score is the average of the two raters' scores.
* GRE Percentile: This represents your rank relative to other test-takers. A percentile score of 80, for example, means you scored higher than 80% of the people who took the GRE in a recent period. It's calculated based on your scaled score, not your raw score. Percentile rankings are updated periodically by ETS (Educational Testing Service), so a percentile of 80 on one administration may not equate exactly to the same percentile on a different administration.
In short: Your score is your *actual* performance on the test (expressed numerically). Your percentile is your *relative* performance compared to others who took the test (expressed as a percentage). Admissions committees often look at both your score and percentile to understand your performance in context.