Skill
From Eco - English Wiki
A Skill can be found under Specialty Skill Tree. They allow the player to learn new crafting recipes, improve speed and efficiency, and other passive benefits.
A Skill may require you to unlock a Specialty and/or prerequisite skill.
Players may learn a skill by spending skill points. Depending on the skill you can put more Skill Points into it to be more proficient.
See also: Skills