Just 51% of United States individuals aged 13 to 17 say they use Facebook - a dramatic plunge from the 71% who said they used the social network in Pew's previous study in 2015, when it was the dominant online platform.
Teens were also three times more likely to say they used either YouTube or Snapchat "most often" than they were with Facebook, providing further evidence that the social media giant's reach is beginning to dwindle.
Alongside YouTube, Instagram was the next highest, with the platforming being used by 72 percent of teens.
Meanwhile, as per the effects of social media on their lives, nearly a third of those surveyed said that the effect was mostly positive, while a quarter said it was mostly negative. Some respondents said that they use Snapchat the most while the others sided with YouTube. Youtube does not even come in the same category as that of Facebook, Twitter, Snapchat, and Instagram. Meanwhile, Twitter followed at 32%, and Tumblr's popularity remained the same since the 2015 survey.
The survey also found differences in the use of social media platforms by gender and race.
The Pew survey found that some 95% of teens now say they have or have access to a smartphone.
In addition, when teenagers asked about the effect of social media some valued it for connecting with friends and family as well as getting news, information.
Researchers of the study believe that the environment has now changed on social media. "It blocks recent search history." said one 15yr old during the survey. This is leading to increased connectivity, with nearly half of teens saying they're online "almost constantly". While 31 percent reported a mostly positive effect and 24 percent a mostly negative effect, around 45 percent said they didn't think social media had a positive or negative impact.
On the other hand, "Facebook never had it", remarked social media consultant Lon Safko."Teens never embraced Facebook from the beginning".
As Facebook's popularity dropped by around 20 percentage points in the last three years, both Snapchat and Instagram grew at a similar rate. Only 24 per cent said it has mostly a negative impact, while 31per cent said it's mostly positive.