The advanced servers are a place in Free Fire where developers launch the beta applications to test them in a contained manner. Using the free fire advance server, you can get unlimited diamonds for free by just playing the game.
If you find any mistake, Bug, Glitch, while playing in free fire advanced server, you will be rewarded with 2000 diamonds. You just need to send the screenshot of the Bug. In advance server, most of the legendry items are very cheap, and most are free.
Now complete the simple tasks available on the event page and get free diamonds.