What is a goalie stat?

Answer 1

Save Percentage reads as follows:

0.90

This goalie stat simply means they saved 90% of the shots they faced.

The GAA (goals against average) reads as follows:

2.50

This means, on an average game, they allow 2.5 goals in.

These are the two most common goalie stats, and then they're is Win-Loss

Ratio, which reads as follows:

10:5

This means they won 10 games and lost 5 games.