Use the format: `https://wa.me/
Remove all spaces, plus signs, brackets, and dashes from the phone number
Include the country code before the phone number
Example: `https://wa.me/15551234567`
To add a prefilled message, use: `https://wa.me/
Replace spaces in the message with `%20`
Example: `https://wa.me/15551234567?text=Hello%20there`