Pu Er (often searched as 'Pu Erh teas') is the most famous category of post-fermented tea.   Some tea drinkers stumble upon them after reading about 'Pu Erh benefits'; since the launch of Xiaguan Tuo Cha's 'Xiao Fa Tuo' in French pharmacies in the 1980's, multiple sources have recommended consuming Pu Er for health reasons.  There is, however, much more to it!