I see a lot of skill points, gear etc can be used to enhance "active skills". I can't seem to find any info on what these "active skills" are exactly ?

I'm not 100% sure, but I think it's the skills you get from a weapon's skill tree. Like the sword's sheathed slash, or the tonfa's pulverize.

@Fallenangel700

Active skills are like previously stated, Skills you can unlock in the Weapon Trees they are skills or perks you can buy with the points from using the type of weapon, I'd the skill you buy/unlock says Active Skill in the left corner of the pop up when you hover over the skill it is an active skill. For example almost every weapon type let's you unlock a extra attack tied to the triangle button(ps4) that can be used as an extra move in a combo, that's an active skil.

Active skills can be buffed by either assigning the Green Skils to them in the Skill Customization Page and from Static effects from weapons and gear. Usual its phrases: Hight Attack Skill Ki Damage/Low Attack Skill Ki Damage, or Mid Aattack Skill Daamage or Strong Attack Skill Damage or Quick Attack Skill Damage

Anything that rolls on an peice of Gear, Weapon, or Accessory with the notation -Skill Damage refers to an particular extra move you unlock beside the quick attack or strong attack, and it does extra damage or ki damage to enemies

Still not seeing the words Active skill anywhere. "skill you buy/unlock says Active Skill in the left corner of the pop up when you hover over the skill it is an active skill"

Not seeing any 'Green skills'. "either assigning the Green Skills to them in the Skill Customization Page"