Satyanarayan Puja is dedicated to Lord Vishnu in his form as Satyanarayan — "the true, eternal one" — and it's one of the more flexible pujas in terms of when it's performed, which is part of why it's so common.
When it's typically performed
Unlike pujas tied to a fixed festival date, Satyanarayan Puja is often performed to mark a personal milestone: a housewarming, a wedding anniversary, a child's birthday, recovery from illness, a new business, or simply as a periodic act of gratitude — commonly on a full moon (Purnima) or Ekadashi, though households also schedule it whenever feels right.
The story behind it
The puja centres on the Satyanarayan Katha, a story traditionally recited during the ritual about the consequences of making a vow to Lord Vishnu and then neglecting to fulfil it — and the eventual return to grace through devotion and honesty. The recitation itself is considered a core part of the puja, not just a formality around it.
What the ritual involves
A typical Satyanarayan Puja includes cleaning and decorating the puja space, an idol or image of Vishnu, offerings of fruit, panchamrit and a specific sweet prasad made from wheat flour, banana and ghee (sometimes called sheera or halwa), the recitation of the katha across five chapters, and an aarti to close. The prasad is then distributed to everyone present — sharing it is considered an essential part of the ritual, not an optional afterthought.
Because it isn't tied to a single date, many families treat it as their go-to puja whenever they want to mark something significant without waiting for a specific festival on the calendar.