On May 31, 2019, the Department of State updated its immigrant and nonimmigrant visa application forms to request additional information, including social media identifiers, from most U.S. visa applicants worldwide. This information will be collected on the Form DS-160. There is some good information at the link below about what this means to visa applications.
https://maggio-kattar.com/blog/nonimmigrant-visa-application-ds-160-now-collecting-social-media-information/