With Boei, you can create a Signal button widget for your website within minutes. It is super simple!
This is how it will look like:

How to get there: Go to Setup → Widget in the top menu → click your widget → click Add Channel and select Signal.
See Installation Guides.
Create an account on Signal if needed.
Create a new channel in Boei for Signal. This is how you do it in Boei:

When people click the channel, the page will be loaded in a new window.
You can hide this channel when you are out of office. This helps to reduce Signal messages when you are not available. Learn more about business hours.