Core Insights - AppLovin Corporation (NASDAQ:APP) was highlighted as the best-performing S&P 500 stock in Q3, described as "unstoppable" despite being relatively unknown [1] - The company operates a software platform that aids advertisers and publishers with app discovery, real-time ad bidding, analytics, and connected TV distribution, in addition to developing free-to-play mobile games [2] Company Overview - AppLovin is a mobile technology company that assists app developers in monetizing their applications through advertising [1] - The company provides tools that enhance the advertising experience for both advertisers and app publishers [2] Investment Perspective - While AppLovin shows potential as an investment, there are opinions suggesting that certain AI stocks may offer greater upside potential with less downside risk [3]