Just like in the previous two games, you are a Witcher and the customary job of a Witcher is to track and slay monsters in return for pay. While your search for Ciri takes precedence over everything else, you may find time to undertake some paid side missions, known as contracts, that benefit the local populace and fatten your purse as well.
Contracts are optional quests Geralt can choose to complete and can be found by reading the appropriate notice board posting, or stumbling upon the contract giver or the monster that is to be slain. There are 26 witcher contracts in total in The Witcher 3: Wild Hunt. The monsters encountered during the contracts will be tougher versions of those Geralt may meet along his travels elsewhere. They will be susceptible to the same oils, potions, bombs and signs as their lesser forms but be sure to check the level associated with the contract quest to ensure you are ready to meet the challenge. A quick study of a creature's weaknesses in the bestiary will be helpful in preparing to take down your foe.