Traditionally, the term altar refers to a platform or otherwise elevated structure used for religious purposes such as sacrifice, prayer, or simple worship throughout thousands of years.
Primitive cultures used a simple stone to place worshippers’ gifts and offerings to the gods, and the ritual was passed down through Egyptian, Greek and Roman times, but can also be found in Japanese, Buddhist, Mayan and many more cultures and religions.
In non-religious contexts, an altar is considered a sacred place of spiritual focus and a physical reminder of someone’s dedication to their spiritual practices and power. It can really be used for anything you want, in whatever way best fits your needs, ss there’s no “right” or “wrong” way to address your own spirituality and devotion.
Some people might use an altar simply for lighting incense and centering themselves before a busy day out in the world, others may find it helps them meditate or visualise throughout their day. You can use it to do astrological or tarot rituals, to find stillness in a moment of prayer or gratitude, to honour the passing of loved ones, or simply have a spot in your home that incentivizes your spiritual or personal development.