https://thenextweb.com/facebook/2020/04/17/facebook-is-adding-a-hug-reaction-to-show-you-care-during-the-covid-19-pandemic/

Facebook is adding a new reaction to live alongside the Like button and the existing reactions: ‘Hug’

The reaction shows an animated emoji hugging a heart, meant to help you “show your support” to friends and family during the ongoing coronavirus pandemic. Presumably most people used the ‘Love’ reaction for similar purposes, but the hug reaction shows a bit more directly that you care about the person rather than the post.