Your blessed touch can heal wounds. You have a pool of healing power that replenishes when you finish a Long Rest. With that pool, you can restore a total number of Hit Points equal to five times your Paladin level.
As a Bonus Action, you can touch a creature (which could be yourself) and draw power from the pool of healing to restore a number of Hit Points to that creature, up to the maximum amount remaining in the pool.
You can also expend 5 Hit Points from the pool of healing power to remove the Poisoned condition from the creature; those points don’t also restore Hit Points to the creature.