The company is a top play on artificial intelligence (AI).Shares of AppLovin (APP -3.39%) jumped following its second-quarter earnings report after yet another strong quarter of revenue and profitability growth for the adtech company. The stock has been a strong performer this year, up over 75% year to date.Let's look at what's behind the company's resurgence, if it can continue, and whether the stock is a buy.Impressive second-quarter resultsAppLovin's success stems from the release of its Axon 2 artificia ...