What does Numbers 25:11 mean?

'Phinehas, son of Eleazar and grandson of Aaron the priest, has turned my anger away from the Israelites. He was as passionate for my honor as I am, so I didn't destroy all of them in my anger.' Numbers 25:11 - Modern Text Bible

(God recognizes Phinehas's zeal for what is right and credits him with saving the people from total destruction.)