Sorry if this is already a topic I'm on my iPod and can't find the search

Lol you could've just asked in the other thread. Anyway there small passive bonuses that you find in the game, stuff like you can possess white rats for longer, or a drop down assassination gives a bit of magicka, stuff like that

Bone charms provide you with permanent boosts and buffs to your abilities. There is a total of 45, but each individual game will
spawn random 12 from the total pool.

You have to equip them to get there benifits, its not a permanent bonus

It's permanent while it's equipped....no?

true

But you are correct about equipping them. I believe Corvo starts out with 3 slots, but more can be purchased.

There is a total of 6 slots iirc.