Granted by your Background and Class you gain +1d if a skill is relevant to a skill check you are making. Skills are written as a sentence describing how they gain experience. You can only have 7 skills total, if you would learn an 8th you may choose to replace one of your previous 7.
Skills should be written as a sentence eg: Street-rat lookout of the Keshire Bottle-street Gang; Graduated from Omarim College by creating a Sheild Golem; or Esteemed Merchant of the kar Moina family of Cuuberg.