Revenue growth is accelerating again, but challenges remain.Shares of Snap (SNAP +9.73%) surged higher after its latest quarterly report. Investors cheered as the social media company continued growing its daily active users at a rapid clip and saw strong improvements in ad performance. Additionally, the parent of Snapchat -- a camera-centric app popular with younger users -- added a new AI (artificial intelligence) partnership that could boost platform engagement and expand monetization avenues down the ro ...