If a national ban were enacted, Snapchat would see ad revenue decline 6%, while TikTok could see a $1.26 billion drop.

Most states have already passed some sort of restriction of cellphone use in classrooms, to varying degrees of success. Enforcement has proven tricky, and the full impact of these bans on marketers has yet to be determined. However, the majority, 74%, of U.S. adults support banning phones during class, per Pew Research cited by Emarketer. 

Teen social media users are a key demographic for many marketers, and with 19 million users between the ages of 12 and 19, any changes in social media usage can impact the ad revenues of social media platforms, per Emarketer’s “How A Nationwide Classroom Cell Phone Ban Would Affect Social Network Use.” 

Phone bans, and social media bans for teens in general, have gained traction in recent months. To date, a national ban on smartphones is not under consideration, although the regulatory environment around smartphone use and social media use is heating up quickly.

Smartphone school ban could imperil billions in social media ad revenue | Marketing Dive