I do not know if you understand the baker now but.
I used to not understand the baker either for so long, till today when I finally realized what the "reveal" meant from it's info play.
When you reveal a Baker card, the Baker triggers her 'reveal' effect and turn a unrevealed villager card into a Baker card.
For example: You revealed a Baker card and now a unrevealed Hunter card turns into a new Baker card awaiting to turn someone else into a Baker.
That effect can be clicked a lot, get lucky enough and you get every unrevealed villager turned into a bunch of Bakers, which may expose at least 1 evil faking as another role.
If you revealed a Baker as the second card revealed, but then later when all cards are revealed and you see no other Bakers, than the revealed Baker is corrupted or evil.