https://www.pcgamer.com/rainbow-six-siege-players-want-apex-legends-pinging-and-ubisoft-likes-the-idea/

Whatever you make of Apex Legends' meteoric rise, everyone can agree that it gets non-verbal communication right. With a simple button press, players can quickly make specific callouts (“enemy was here” or “need light ammo,” for example). The hugely positive feedback of contextual pinging has left Rainbow Six Siege players understandably jealous, and Ubisoft is taking notes.

Since Apex’s release, the Siege subreddit has been abuzz with requests for more ping options. There’s a bit of irony to acknowledge here—before Apex, Siege was one of the only competitive shooters around with a ping mechanic at all. Apex might be popularizing it, but the OG here is Siege and the Rainbow Six games that came before it. Its dedicated ping button creates a small yellow mark to indicate enemy locations, where shots were heard, where to breach a wall, or anything really. But Siege's pings lack any context unless they’re backed up by a vocal callout or laborious chat message.