Selecting a spark
A spark is an activity-specialized nanobot, the manifestation of your Agent on the planet Nia.
Each version of the spark program has certain pre-installed benefits for different kinds of passive or active robotic abilities. That means that all the benefits you gain will affect your actions while you drive one of your robots on planet Nia.
The first-generation combat spark, Ubenor for example will increase the damage of your weapons and your chance to inflict critical damage.
If you're not sure about the perfect spark, worry not, because you can later switch to another spark, although spark changes will cost you a certain amount of money.
You can read additional info about sparks here.