This article is from the Wicca FAQ, by firstname.lastname@example.org (Rain of Teleport) with numerous contributions by others.
Although some Wiccans focus on particular gods from particular world
mythologies, Wiccans may worship many god(desse)s by many different names.
Most worship some form of the Great Goddess and Her consort, The Horned
God. Such duo-theistic forces are often conceived as embodying
complementary polarities, not in opposition. In some traditions worship
of the Goddess is emphasized, although in others the Goddess and God are
seen as complementary co-equals. The Goddess and God may be seen as
associated with certain things (such as the Goddess with the earth or
moon, God with sun and wildlife, etc), but there are no hard and fast
rules. Some traditions worship the Goddess alone while others see
Divinity as essentially beyond human understanding, with "Goddess" and
"God" simply a convenient shorthand.