Skills are special abilities units have. Learning skills gives units an advantage in battles. Skills can learned via the Party Menu in the Caravan Screen. To learn Skills, units need Skill Points, which are earned in battle. To use a learned skill, unit must "equip" the skill first. This can also be done at the Deploy Troops Screen. A units Skills become more powerful as it's Skill Level increases. The skills that can be learned and Skill Points necessary for leveling up vary by unit. You can't raise skills, to vey high levels at first, but the maximum skill level will rise as your party grows. At first, each unit can equip a few skills. As they level up, the number of skills they can equip rises.