Shatter is a concentrate known for its glass-like look. It is usually amber or golden, translucent, and brittle enough to snap when it is cold, which is where the name comes from. It is made with hydrocarbon (butane or propane) extraction, and then the extract is purged and left undisturbed so it sets as a smooth, stable sheet.
Because it is left still during the purge, the molecules stay arranged in a way that keeps it clear and hard rather than cloudy and soft. If shatter is agitated, gets warm, or has more terpenes, it can turn softer and "sappy," which is sometimes called pull-and-snap.
Shatter is usually dabbed. Break off a small piece with a dab tool; for most people a piece the size of a grain of rice is enough to start. It can also be added on top of flower in a bowl.
Shatter was very popular in earlier years. Today many people prefer badder, sugar or live resin for flavor, but shatter is easy to handle and store. Keep it in its parchment or container, away from heat, so it does not soften.
Check the COA for potency and residual solvent results.