From Runescape - Wiki on Neoseeker

Quests are mini-adventures that you are sent on by various NPCs throughout RuneScape. Varying from simple fetch-and-return requests, to perilous encounters that delve deep into RuneScape's history and lore, Quests help to develop the in-game world and provide many on-going storylines to keep players engaged.

You are rewarded for your efforts in completing a quest, with harder and longer quests giving more valuable rewards. Experience points in any of your Skills, special quest items and access to new areas of the world are the most common reward, but there are also additional spellbooks to unlock, and some skills (including Herblore, Runecrafting and Summoning) require the completion of a quest before you can begin training them.

If you complete all of the quests currently available, you can purchase a Quest Point Cape of Achievement from the Wise Old Man in Draynor Village for 99k coins. You will be able to wear this cape, and perform its unique emote, until Jagex release a new quest. If worn when the update occurs, the Quest Cape will remove itself from your back and into your Inventory, or into your Bank if your Inventory is full. If both your bank and inventory are full then you can get your cape back by visiting the wise old man in draynor village and he will give you your cape back free of charge.

Free Quests

Members Quests

Major portions of this page were written by: ACY3 and FFXmaddean