In a Nutshell:
Bromeliads are members of a plant family known as Bromeliaceae (bro-meh-lee-AH-say-eye). The family contains over 3000 described species in approximately 56 genera. The most well known bromeliad is the pineapple. The family contains a wide range of plants including some very un-pineapple like members such as Spanish Moss (which is neither Spanish nor a moss). Other members resemble aloes or yuccas while still others look like green, leafy grasses.
In general they are inexpensive, easy to grow, require very little care, and reward the grower with brilliant, long lasting blooms and ornamental foliage. They come in a wide range of sizes from tiny miniatures to giants. They can be grown indoors in cooler climates and can also be used outdoors where temperatures stay above freezing.