We’ve always promoted the survey through a banner on WordPress.org, plus an article on WordPress News and through word of mouth. This has been successful in the past, but less so in recent years. In 2015*, 45,997 people filled out the survey, but in 2016 and 2017, less than 10,000 responses came in. We won’t have time to add a notice to everyone’s dashboard (even if everyone agreed that would be wise), so this year I’d like to ask everyone to help promote the survey through as many channels as they have available to them.

https://make.wordpress.org/updates/2019/08/13/wordpress-user-developer-survey-clarifying-goals/