Maybe it depends upon whom you ask. In Judaism they have zero importance. The Essenes were a small sect in Judea who eventually disappeared from the Jewish community. They styled themselves "observant; pious ones." The normative, majority Jewish community viewed them as breakaways from the common stream of Jewish tradition, because of their non-traditional beliefs and practices.
Their beliefs included an excessive amount of dabbling with the names of angels, messianic fervor, gnosticism and eschatological speculation; and their practices were more like Christian monasticism than the generally accepted Jewish way of living.
The practices of the Essenes included vegetarianism, dwelling in isolated groups, communal ownership, monastic asceticism and avoidance of money, commerce and private property; and (among some of them) celibacy. Also, they had some forms of non-traditional observances (such as round phylacteries [tefillin]). Some researchers identify the Essenes as a form of early Christianity, taking also into account the fact that early Christianity was far from uniform and was, for a time, thought of by some as a kind of modified Judaism.
There is no rerecord of the Romans treating the Essenes differently form the other Jews.
The Essenes.
The Essenes :) got it right on a test
The Essenes.
Fragrance
They were a tiny splinter group who broke away from the mainstream Torah traditions and invented some new customs. The Jewish sages disapproved of the Essenes' innovations; and the Essenes eventually died out. They may be the ones referred to when the Talmud speaks of Chitzonim (outsiders).
Essenes
Lena Cansdale has written: 'Qumran and the Essenes' -- subject(s): Dead Sea scrolls, Essenes, Qumran community
Essenes
The Essenes. However, this is not agreed upon by all scholars. See also:The Essenes and others (third numbered item)
The Essenes.
herbal Essenes of course