Your skills are measurements of your level of experience and practice in 18 different adventuring disciplines. Your skill level can range from 0 to 10 in each skill, where 0 represents no prior experience and 10 represents complete mastery.
Each skill is associated with one of your ability scores. Whenever you make a check using a skill, add the modifier of its associated ability score plus your skill level to the result. On rare occasions, the GM may call for a skill check using a different ability score than the one normally associated with the skill, for instance an Intimidation (Charisma) check to threaten a person via blackmail.
See Character Creation Step 2: Skills, Saves, and Specialties.
Read more about each skill below.