The score tells you how well you compare to others in terms of attractiveness, by giving you a percentile.
For example: Top 10% means that you are in the best 10%, better than 90% of the population. Or "Bottom 10%" means you are worse than 90% of the population.
Try not to take it personally, as many factors like photo quality, facial expression, etc. have a high effect. Instead, test multiple pictures to find out which ones people prefer.