Synth sETH is a synthetic asset created by Synthetix that mirrors the price of Ether. It utilizes reliable price feeds provided by an oracle to ensure accurate tracking of Ether's market value. As part of the Synthetix ecosystem, sETH offers users exposure to Ether without the need to hold the underlying asset directly. This allows for flexible trading and investment strategies in the decentralized finance space. sETH serves as a valuable tool for those looking to hedge their positions or gain access to Ether's price movements while benefiting from the advantages of synthetic assets.