There are many quests in the game that will give you specific experience in a skill. Upon completing the quest, along with the Quest points and the step closer to getting the cape you can receive for finishing all the quests, you can get experience points in a skill. There are three types of skill experience.
Quest Experience for Members – These are the quests that give you experience in a members only skill. These are not going to be accessible to receive if you are a freeplay Runescape player.
Quest Experience for Freeplay – These are the quests that give out experience in a skill that is available to Freeplay members. Members can get these as well, but it’s the only place that freeplay members are going to get them.
Quest Experience that’s Choosable – These are in a separate category because you are going to be able to choose that skill in which you want the experience to go. You can choose to have it go into a member’s only skill or a freeplay skill, and as such was put into this separate category in Skill experience.