eMarketer:

eMarketer: in the US, TikTok is expected to grow 21.9% YoY to 45.4M MAU in 2020, down from 97.5% growth in its breakout year of 2019  —  More than 20% of social users will use TikTok this year … After nearly doubling its US user base last year, growth for TikTok will slow in the coming years …

eMarketer: in the US, TikTok is expected to grow 21.9% YoY to 45.4M MAU in 2020, down from 97.5% growth in its breakout year of 2019 (eMarketer)
Source: Tech Meme