To win level 40 in Fortnite, you need to focus on various activities that provide experience points (XP). Here’s a detailed step-by-step guide:

1. **Complete Hidden Quests**
– Ensure you have the latest updates and patches installed in the game.
– Look for hidden quests. These quests are usually found in the game’s menu under “Quests” or by checking the in-game map for marked locations.
– Complete each quest. These quests often require you to enter a new match for each one, but they reward significant XP upon completion.

2. **Play Battle Royale**
– Engage in Battle Royale matches.
– Focus on eliminating players to gain XP. Each elimination rewards XP, and completing survival medals also provides additional XP.
– Aim to get Mythic weapons and eliminate Mythic bosses. This will significantly boost your XP gain.

3. **Complete Weekly Quests and Milestones**
– Check the game’s menu for weekly quests and milestones.
– Complete all available weekly quests and milestones. Each milestone typically rewards 15,000 XP, which can be very beneficial for leveling up quickly.

4. **Participate in Creative Mode**
– If you have access to Fortnite Creative mode, use specific maps designed for leveling up.

5. **Play Other Modes**
– Engage in other game modes like Fortnite Reload and Rocket Racing.
– Focus on completing daily quests and challenges in these modes. Completing daily quests can reward additional XP.

6. **Manage Your Time Efficiently**
– Allocate your time effectively across different game modes and activities.
– Prioritize activities that provide the most XP, such as completing quests and eliminating players in Battle Royale.

By following these steps and managing your time efficiently, you can level up quickly and reach level 40 in Fortnite.