To follow a social media profile, enter its address. For example:
xkcd.com/atom.xml
news.ycombinator.com
twitter.com/elonmusk
twitter.com/hashtag/TelegramTips
twitter.com/search?q=searchquery
youtube.com/channel/UCF0pVplsI8R5kcAqgtoRqoA
youtube.com/vevo
youtube.com/user/rihanna