The use of gravity gradient (GG) data in exploration is becoming more common. However, interpretation of gravity gradient data is not as easy as the familiar vertical gravity data. For a given source, regardless of its simplicity, gravity gradients often produce a complex pattern of anomalies (single, doublet, triplet, or quadruplet) as compared to the simple single (monopolar) gravity anomalies. This paper is a minitutorial on gravity gradients and is designed to provide a simple explanation of the complex pattern of GG anomalies and suggest some guidelines for the interpretation of measured surface GG data.