A transform boundary is a type of tectonic plate boundary where two plates slide past each other horizontally. This movement can cause earthquakes as the plates get stuck due to friction and then suddenly release. Unlike convergent or divergent boundaries, transform boundaries do not create or destroy crust. One of the most well-known examples of a transform boundary is the San Andreas Fault in California. Here, the Pacific Plate and the North American Plate move in opposite directions, leading to significant seismic activity. Understanding transform boundaries is crucial for assessing earthquake risks in affected regions.