How do you do a quest on World of Warcraft

Read the description, and it will assign you a task to complete (for example: say a quest giver wants you to kill 10 lions and 10 raging lions. There is a difference in the names of the targets, so if you kill a swift lion, though they may look the same, you won't get credit.) Some quests want you to escort a person safely. This will require extra work. Some quests just want you to deliver an item or note to a person far away. Take a flight path or walk to the location described until you see a yellow question mark over the NPC's head. Talk, to him/her and click 'complete quest.' Quests that are too high lvl for you have a grey mark, and ones that are too low won't show anything (but you can still do them, you won't get any experience from it though.) Available quests you haven't picked up yet look like yellow exclamation points. Some quests want you to acquire items. If you don't have enough bag space for them, you can't complete it. Don't destroy quest items unless necessary, this results in having to do it all over again. Colors of quest difficulty are shown in your quest log. They range from grey (useless, if you have these, abandon them) green (easy, low xp gained) yellow (low-medium: good reward) light red (medium-hard: great reward, lots of xp is earned) and dark red (very hard: join a group if you want to do this, otherwise die trying!) Quests in red deal with targets of higher level than you, so be cautious. There is a limit of 25 quests you can have on you at a time in your log, so if one has 'complete' over it, turn it in.