10/10/10/10 is the basic Attack/Defense/Speed/Growing

Attack make you stronger when you attack. It do not work against neutral planet.

If you attack a planet with 5 ships and you have 20 in attack (against a player with 10 in defense), you will kill 10 ennemies troups.

Defense make you stronger when you defend.
If an ennemy attack you with 10 ships (with 10 in attack) and you have 20 in defense, you will loose only 5 troups.

Speed make yours ships move faster.

Growing allow your planets to produce faster.