In Mechadroids, attributes are values which represent how well your Mechadroid performs in specific areas. There are four in total.
The attack attribute represents how good your Mechadroid is at attacking and directly effects the chance to hit. The higher this attribute is the more likely you'll make a successful attack on your target.
The defence attribute is the opposite to the attack attribute. It represents how good your Mechadroid is at defending attacks and also directly effects your enemy's chance to hit. The higher this attribute is the less likely your enemy will make a successful attack.
The speed attribute represents how fast you attack. This directly effects whether you attack first and how many times you attack compared to your enemy.
The chassis attribute represents how tough your Mechadroid is and how much damage it can take before it is defeated. For every one point of chassis attribute, your Mechadroid gains five points of health.