Why is family so important to Mormons?

Our families provide a setting for much of the growth we experience in life.

In our families we love, serve, teach, and learn from each other. We share our joys and our sorrows. Family ties may bring us difficult challenges, but they also give us strength and some of our greatest happiness.

The family is central to God’s plan for His children. It is also the central unit of society and the means for bringing children into the world where they can be loved, provided for, and taught truth and righteousness (see “The Family: A Proclamation to the World”).

While we cannot choose the conditions of our birth, we can choose each day to make our families stronger and happier. It is possible for individuals to return to the presence of God and for families to be united eternally.

Original source: https://www.mormon.org/faq/importance-of-families