Leveling up is essential to advancing in Diablo 4. The game world continues to level with the player, so they must keep upgrading their gear along the way. Otherwise, they won't survive. So long as they can do that, these tips and tricks will help players gain levels efficiently.
To level up fast in Diablo 4, you should aim to get as many XP bonuses as possible, alongside completing the campaign to access higher difficulties. If you don't want to waste time or energy, you can buy fast Diablo 4 Power Leveling service from a reliable site.
Running Important Dungeons for More Points
Champion's Demise Dungeon
If you haven't beaten the campaign, just do it because you must do it once. When you level a second character, you can do the campaign again or skip it. It is much faster to skip the campaign if you want to level up. Let me tell you how everyone has been leveling. What they have done is pick a dungeon and go clear it very quickly.
Champion's Demise is considered the best dungeon because it is kind of like a Wolverine Claw with three lanes. You take a group, and everyone goes & clears one lane, and then you leave the big trick to these dungeons.
The idea is to Zone into a dungeon, kill a bunch of monsters very quickly and finish the quests. This is the way that Immortals solve. Because they backloaded all the rewards instead of front loading it, you would get a lot of XP for completing this dungeon and get all the juicy loot that incentivizes you to finish it.
That's the most obvious thing ever, leave the dungeon, escape, leave the game in that order, and log back in, and then you'll be right outside the dungeon, and you can walk in if you don't do that. It'll port you to a town, and then you have to mount up and ride back to the dungeon, which isn't very pleasant.
Another thing you can do is to pick really Godly dungeons next to each other. Just go back and forth, and back and forth, so anyway, running Champion's Demise dungeon is the best.
Ruins of Eridu Dungeon
This is like a tiny little dungeon full of mobs and elites, but it will get patched soon, so go in here with your friend and farm the dungeon.
Killing Everything You Meet to Obtain More Points
You should find a lot of demons and kill them. Try to get into the habit of walking between quests and slaughtering every enemy that you meet.
Completing World Events to Earn More XP
Legion Event
What can you do from level 1 – 50? There are certain events that pop up called Legion Events. It is repeating group activities that yield fantastic rewards for players who can earn Mastery fast enough.
It will give you the most XP for the time. I think that's the highest XP per hour. Now you can only do it occasionally when they're up. Throughout the progression of a Legion Event, after you defeat monsters, it will reward you some Diablo IV gold, XP, and items as normal. After defeating the Overlord and dungeon boss, up to three Radiant Chests will spawn.
Ancient Obelisk World Event
Ancient Obelisk is a World Event found in the Fractured Peaks region in D4.
Inspect the Ancient Obelisk
Stand on the Pressure Plates
Complete Any Mastery Objectives
Slay Any Remaining Enemies
After completing this world event, you can earn gold and other D4 items.
Helltide World Event
Another very good thing is Helltide, a gameplay feature of Diablo IV. Now the thing about Helltide, which I can port here and show you, is the monsters are always at your level plus two, no matter what. This is very important in the end game, so if I go here on my level 100 and go outside, I notice the monsters are at Level 102.
The only way to find level 102 monsters or higher is in Nightmare Dungeons. Helltide is another great way to get XP and the best way to build wealth on your account. You probably get Forgotten Souls by doing 
Helltide.
It is a rare material to reroll Sacred and Ancestral items in Diablo 4. It can only be found in Helltides by opening chests, killing rare monsters, and opening Scream Hell Veins, a particular ore node that only spawns in Helltides.
Doing Some Important Side Quests to Earn More Experience
There are plenty of side quests to distract players from the main storyline in Diablo 4, and it's a good idea to step off the beaten path and get a few done, even if it's just to earn the extra gold.
I recommend grabbing every side quest you see, and while you are out completing the main campaign quests, finish a few side quests here and there.
Earning Renown for Bonus XP
The Renown system offers many rewards, such as gold, extra skill points, and even extra Health Potion charges, but you'll get as you progress in each region is bonus XP.
To earn enough Renown to get every XP bonus available, you'll need to complete as many optional activities in the world as possible. This includes everything from simply walking around to discover new areas, which nets you 5 Renown for each area, to completing Side Quests, Dungeons, and Strongholds, which grant you 20, 30, and 100 Renown, respectively.
Completing Strongholds For XP Rewards
Strongholds are accessible through the open world. You can choose to face the terror alone or with a party but don't expect to bump into random players.
Strongholds are generous in their rewards, offering an eclectic mix of precious loot, experience, and even Renown Points for the area where the Stronghold was conquered.
Raising Your World Tier to Increase Profit
By selecting Adventurer or Veteran difficulty from the Character Select Screen or the World Tier Statue in Kyovashad, you'll earn a significant 20% increase in experience gain. Although Veteran difficulty may seem daunting, with the right build, it's doable. Plus, the rewards are worth it. You will level up fast, and you'll also have access to better loot drops. So take on the challenge and prepare to dominate Diablo 4's world tiers!
Related Links:
A Guide To Diablo 4: Farming Gems, Leveling up, and Killing Ashava