Signal is making a bunch of improvements to calls so they are more competitive with Zoom and Google Meet, including the ability to share a link to a call.
Previously, you could only initiate a call from a Signal group chat, so this new feature should make it much easier to hop on the phone with a friend or co-worker by sending them a link inside or outside of Signal. You can also re-use call links, which could be handy for recurring work meetings or a weekly chat you have with your family.