A Wiccan tradition started by Gerald Gardner in the 1950s. Many people consider Gardnerian Wicca to be the most 'authentic', but many of the details of this tradition are only available to those who have been initiated into a Gardnerian coven. Belonging to this tradition requires a great deal of commitment and learning. There is a specific hierarchy within any coven (initiate, 1st degree, 2nd degree, 3rd degree).
As with any Wiccan tradition, the defining qualities of an Gardnerian coven are not always clear-cut, and further research will help you understand the details of this tradition.
Dispersing excess energy from your body, frequently done with visualization that directs this energy into the ground. Grounding is done after a spell or ritual, or after astral work, or whenever you feel the need to focus yourself.