From wow.incgamers.com

Daily Quests are a special type of quest that you can do once every day, with a maximum of 25 different daily quests durng one day. The rewards usually include gold, experience and reputation with a given faction, and often give more than many other plain "repeatable" quests, as they are limited to once a day. The idea was made by Blizzard who wanted to make the grinding for gold or rep slightly more fun, so instead of having an infinite amount of repetitions, it's limited to a number per day, putting a maximum on how much a single person can do, and thereby making it easier for Blizzard to increase the overall rewards.

They work as a "middle ground" between the "hardcore grinders" and the "casuals", limiting all player's abilities to progress in given area, while still giving good rewards and being able to still have some really hard quests in addition to the hardcore grinders.

Some quests, such as Cooking, Fishing, Heroic and Dungeon daily quests usually have a "pool" of quests, of which one is determined randomly each day. If you don't finish a quest one day, you can still turn it in the next day, but it would then count as you have used up that day's Daily Quest of that type. This means that if you have a favourite quest active one day, when you don't have time, you can go get it in what little time you have and do it the next day. A good example is if you like Alterac Valley, but not WSG. One day you don't have time to do the quest, but it is AV Quest Day, so you go grab the quest... The day after just happens to be WSG day, but you use your AV quest and turn it in, having completed the one available Battleground quest for the day.

In order to get the "real" quest of the day, you have to abandon the one you are on to take "today's" quest. Please note that as the quest is determined randomly, you might have the same quest several days in a row.

Factions

Here are the different factions, and the daily quests that they offer:

Honor Hold

• Hellfire Fortifications

Netherwing

These daily quests require Neutral standing with Netherwing to be available:

• A Slow Death
• Netherwing Crystals
• Nethermine Flayer Hide - requires Skinning
• Nethercite Ore - requires Mining
• Netherdust Pollen - requires Herbalism
• The Not-So-Friendly Skies...

Note: Only one quest that requires a gathering skill may be completed per day.

These daily quests require Friendly standing with Netherwing to be available:

• Dragons are the Least of Our Problems
• Picking up the Pieces...
• A Cure For The Common Worthless Peon

These daily quests require Honored standing with Netherwing to be available:

• Disrupting the Twilight Portal

These daily quests require Revered standing with Netherwing to be available:

• The Deadliest Trap Ever Laid - For characters belonging to the Aldor faction.
• The Deadliest Trap Ever Laid - For characters belonging to the Scryer faction.

Ogri'la

• Bomb Them Again - Also rewards reputation for Sha'tari Skyguard

• The Relic's Emanation

• Wrangle More Aether Rays! - Also rewards reputation for Sha'tari Skyguard

This daily quest requires Honored standing with Ogri'la to be available:

• Banish More Demons

Sha'tari Skyguard

• Bomb Them Again - Also rewards reputation for Ogri'la

• Escape from Skettis

• Fires Over Skettis

• Wrangle More Aether Rays! - Also rewards reputation for Ogri'la

[[Shattered Sun Offensive

Also known as the Sunwell Isle Quests. The initial set of quests are made to take back the Blood Elf village on the Sunwell, and then push into the Sunwell Plateau to stop Kil'jaeden from entering in to Azeroth. As this is slightly more complex than your average daily quest, please go to the Sunwell Isle Quests article instead.

Thrallmar

• Hellfire Fortifications

Profession Daily Quests

Cooking Quests

Fishing Quests

Read the full Fishing Daily Quests page for more information.

Instance Daily Quests

Dungeon Quests

There are 2 daily quests available, one is for a normal dungeon and one for a Heroic dungeon. The destination dungeons changes from day to day, but the rewards are as follows:

• Normal dungeon daily quest reward: 1 x [Unknown Item: Ethereum Prison Key] and 16 39, obtained from in Lower City, Shattrath.

• Heroic dungeon daily quest reward: 2 x [Unknown Item: Badge of Justice] and 24 60, obtained from in Lower City, Shattrath.

Battleground Quests

The quest givers for the Battleground daily quests can be found in capital cities near the Battlemasters. The quest is to win a particular Battleground, which varies from day to day. The reward also varies by level, but at level 70 it is 419 bonus honor and 11 99.