https://www.cnet.com/news/fortnite-season-8-everything-you-need-to-know/

One of the coolest ideas in Respawn's rival game Apex Legends is the ability to hit a button to ping your teammates. It didn't take long for Epic Games to get the message, and now you can do the same in Fortnite. Hit a button and you'll be able to call out an enemy's location, where good loot is located and other quick squad communications. It's a beloved feature in Apex Legends and it makes sense that Epic decided to add it to this game. 

A view from the bottom of the volcano.