Term: Difficulty Class / DC

A number a roll has to beat, similar to Armor Class for Attacks. Difficulty Class is usually assigned to, and used for, Skill Checks, Abilities and Features, and other common challenges that do not revolve exclusively around combat.

A GM will set the DC or follow a guide, more oft than not, depending on the actual difficulty of the challenge faced. That being said, a general rule of thumb will be using the table below, which compares CHASE's (and technically Pathfinder 2E's) DC vs more traditional TTRPGs, especially 5E compatible ones. With credit to the Know Direction podcast.

Challenge / Difficulty	CHASE DC	Difference	Traditional DC
Very Easy / Untrained	10	+5	5
Easy / Trained	15	+5	10-14
Moderate / Expert	20	+10	15-19
Hard / Master	30	+10	20-24
Very Hard / Legendary	40	+15	25-34
Nearly Impossible	50	+!5	35