Live resin is made from cannabis frozen at harvest rather than first dried and cured. Live rosin is solventless: ice water, heat, and pressure are used instead of chemical solvents.
Live resin compared with refined distillate
Live resin and distillate sit at opposite ends of how much plant character survives extraction. Live resin starts from plants frozen at harvest, so more of the plant's aroma carries through. Distillate is refined until it is close to neutral. The explainer on how distillate differs from resin covers that refining step. For how those aroma compounds affect what you taste, read aroma compounds and how they reach the palate. The composition line on each pack names the extract used.