The free "Call to Action" web part allows to easily publish a call to action button, including some descriptive text.
Web Part Configuration:
Title: enter the optional web part title
Web Part: AEButton
Configuration: enter the below configuration options:
button=Register Now (enter the button caption) url=http://sometarget (enter the target URL) title=Tax Conference 2020 (enter the title text) text=add some text here (enter the body text) target=new tab|in place (specify the browser tab for the target link) bgc=orange (enter the optional background color) css=add your optional CSS styles