Although Facebook 3rd Quarterly 2017 data show that the monthly active users in the United States and Canada continue to grow, but the latest survey shows that in 2017 the average monthly US Facebook users per month and the number of visits are declining. Research firm eMarketer quoted digital media research firm Verto Analytic data reported that the current average Facebook users over the age of 18 in the United States monthly average usage time and the number of visits is still the highest in other social networking sites.However, compared to the 2016 data, Facebook users The average monthly usage time has dropped from 32 hours and 43 minutes to 18 hours and 24 minutes at present; the number of visits also dropped from the previous 311 times to a decrease of 173. However, on average, each user visited The previous 6 minutes and 18 seconds, extended to 6 minutes and 23 seconds.Compared with the decline in Facebook users in the use of time and the number of visits, Snapchat and Facebook Messenger users use time and the number of visits showed a rise in the monthly use of time In terms of Snapchat, Snapchat increased from 3 hours and 3 minutes to 4 hours; Facebook Messenger increased from 54 minutes to 1 hour and 34 minutes. In terms of monthly visits, Snapchat increased from 119 to 144, Facebook Messenger increased from 64 to 67. eMarketer said RBC Capital Markets, an investment bank, had also previously found out about the survey of U.S. social media users , Indicating that the proportion of people who use Facebook less in the next 12 months will be higher than the percentage of those who indicate that they will increase their use of time, especially 25% of users between 19 and 35 years of age Using Facebook time, while 21% of users between the ages of 13 and 18 said it will reduce the use of time.But eMarketer also pointed out that their own survey results show that the average daily adult Facebook users in the United States spent on Facebook time 41 minutes, slightly up from 40 minutes in 2016.