Zcash’s Sapling upgrade made a few key changes that improve transaction speeds and privacy.
You can learn more about the Sapling upgrade at z.cash. Don’t forget to update your software as needed.
NOTE: This long awaited upgraded came out at almost the same time as a long awaiting Monero upgrade. Monero and Zcash are the top two privacy coins, and both just got a lot quicker and more private. Each tackles privacy in a unique way, so it is interesting to see these top two competitors upgrade in unison like this.