Plain meaning
Start with the shortest useful explanation before going deeper.
A move-to-earn fitness app originally launched on Solana where users purchase NFT sneakers and earn GST and GMT tokens by walking or running. STEPN reached peak activity in mid-2022 with millions of users, becoming one of the most visible Solana consumer applications. The project later expanded to multi-chain support but remains closely associated with the Solana ecosystem's mainstream adoption push.