If you want to level accounts through questing methods Then completing Waterfall quest gives by far the most valuable bonus exp that RS gold will take your skills very quick to high levels. Make sure to think thoroughly about your strategy and each choice. You're just a human and it is possible to make a mistake but it is pretty easy to be successful in PvP when you're well-prepared.
Quests are the missions assigned by non player people (NPC) in the game. They usually require traveling to specific locations, doing various tasks and sometimes defeating a antagonist in the story.
In RuneScape it isn't linear in nature so each mission if different than the other. As a result, they're not an arduous task as in other games but an exciting adventure that can will give you a sense of accomplishment. There are quests to complete in Old School RuneScape are often "gates" that block players from accessing specific locations, NPCs and even items. Completing those might unlock an incredible hunting area with buy OSRS gold your favourite mobs, capability to wear higher level armors , or even help you learn how to use specific spells.