In an email to the users, Flickr unveiled that it was acquired by the photography platform for visual storytellers SmugMug. Those who choose not to delete their accounts by May 25, 2018, will have all their content transferred to SmugMug. The others must download their photos/videos and delete their accounts until then.
https://www.notebookcheck.net/SmugMug-acquires-Flickr.300678.0.html