Encrypted messaging isn't magic - WIRED
Encrypted messaging is becoming more widespread and you should probably be using it. The data that is sent across the net by companies like WhatsApp and Signal is rendered to be gobbledygook by encryption, so no one but the intended recipient can decipher what the message is -- even owners of the platforms themselves.
It's not a magic privacy bullet, however. There's the obvious issue of you needing to trust the recipient of the information. Syncing access to these messages across multiple devices also increases the risk of your information getting into the wrong hands.
"Relying solely on these encrypted messaging tools without considering how they work, and without adding other, additional protections, leaves some paths exposed."