"Key stats" is a shortened phrase for "key statistics," which refers to the most important or significant numbers or data that provide valuable information about a particular topic or subject. Full definition
Every time you tackle on the same route it'll automatically pull together key stats from your previous attempts. (techradar.com)
For a value investor this is entirely normal, and the lower share price gave a more attractive entry point, as shown by the company's key stats in the table below. (ukvalueinvestor.com)
See pace, distance and other key stats on display, while recording elevation climbed, split times & a map of your route. (fitbit.com)