Eucharistic adoration is the practice of adoring the Blessed Sacrament. Some parishes and chapels offer perpetual adoration where the Blessed Sacrament is always exposed, at all hours of the day, and often open to the public. In perpetual adoration, the Blessed Sacrament can never be left alone, so at least one adorer is required at all times.
Some adoration liturgies are highly structured, with prescribed times for the rosary or a chaplet of divine mercy, litanies, hymns, and silent prayer. Other adoration liturgies are marked only by the opening Exposition and closing Benediction, without any collective prayers during adoration. The act of adoration in itself is a deeply personal experience and devotional act. You are in the real presence of Christ present in the Eucharist; actively acknowledge this mystery and meditate on it.