After reading the article I still don't know what the Quantum computer DID exactly. What did it compute? What question asked and answered? All I got was "bench

After reading the article I still don't know what the Quantum computer DID exactly. What did it compute? What question asked and answered? All I got was "benchmark". But my benchmark of "smashing monitors with a hammer" says my hands beat any quantum computer so I am disinclined to believe the usefulness of a benchmark. Quantum computing news seems on par with fusion. The actual field may indeed progressing but nothing useful yet.