Skill points are used in the research lab to discover new skills and features. In order to start your research, all you have to do is tap on the research lab, and hit start research! Our little research guy will then start researching the next skill.
The research itself takes some time, but you can cut some time off the counter by watching an ad, or bypass it completely with super-cash.
Skill points are earned by completing quests and doing Prestiges.
Skill points are a valuable thing in your arsenal in Crypto Idle Miner, since they unlock some game-changing features, and generally make the game much funner to play.