Witches can be grouped into two basic types, the coven or group Witch often referred to as a Wiccan, and the solitary Witch or Hedgewitch. There are further subdivisions within these broad definitions that I will not attempt to explain here. Very generally some find the company, support and advice others can give a vital part of their Craft.
Others find satisfaction and enjoyment on the solitary practice of their beliefs. Neither is right or wrong, each just suits different people, and people may change over time with solitaries joining covens and Wiccans opting for the solitary path.