Gridsum Holding Inc. announced that it has been appointed as the OTT Monitoring Standards Group Leader at the Mobile Marketing Association China ("MMA China"). Gridsum's role is to recruit group members and draft the first OTT advertising monitoring standards in China. The OTT (over-the-top) advertising industry is growing rapidly. Compared with other advertising delivery platforms, OTT advertisements allow marketers to reach consumers directly with interactive and highly targeted content, making it a rapidly growing and increasingly popular medium.