You can find the talent modification menu by tapping the Main Menu, select Combat Abilities, then Camp Skills.
Here you can increase various attributes by consuming Camp Contribution.
Camp Contribution can be obtained through Camp Quests, Season Battlefield, Monster Invasion and Camp Donation (Expansion).

You must upgrade the Camp Library to level up tier 1 camp skills beyond Lv.10.

Tier 2 Camp Skills are unlocked when their corresponding tier 1 skills reach Lv.10. To level up tier 2 skills beyond level 10, their corresponding tier 1 skills must reach Lv.20.

Tier 3 Camp skills are unlocked when their corresponding tier 2 skills reach Lv.30.