Jobs are essentially character classes and they determine what abilities your characters have access to. Each of the game’s 24 jobs has a maximum Job Level of 14 and to level up jobs you need Job Points (JP). You earn JP for your party members’ current job at the end of each battle, for all members still standing at the end.
Important : Job Level also determines the damage your character does. When you’re handing out new roles, try to keep some characters in high level jobs so your damage output doesn’t suffer as much!
With every new Job Level, you will acquire a new ability specific to that job role. Abilities come in two distinct flavours. Command Abilities can be used in combat, to inflict greater damage or assist your allies, for example. Each character can use Command Abilities from their current ("main") job and a "secondary" job that you’ve assigned.
Support Abilities passively aid your character, but you must equip them before you can benefit from them. You can equip Support Abilities from any job and as many as your character’s support ability cost limit allows. The limit starts at 1 and you’ll gain an additional point after each crystal awakened.
Characters can only use abilities they’ve learned themselves, so you’ll need to be smart when deciding everyone’s roles. Although some abilities only need to be equipped on one party member to benefit the whole group (such as the Dungeon Master ability gained by Level 4 Feelancers).
One great benefit is that Bravely Default allows you to mix and match your characters’ job roles at any time. The abilities each character can use can be from any job role that they have levelled up thus far, allowing you to create a truly versatile team of monster killers!
To recap, each character can use…
Their current job’s Command Abilities.
One other job’s Command Abilities.
Support Abilities from any job up to max cost.