Mobile advertising and app-monetization platform (NASDAQ: APP) that became one of the surprise stock-market stories of 2024–2025, rallying on the strength of its AXON AI ad engine. AppLovin is now cited as the cleanest public-market example of an AI model driving measurable per-impression ROI for real customers — not demo hype. Relevant to SaaS founders as evidence that AI as a feature inside an existing product loop can be worth more than AI as a standalone product.