Enter in your WhatsApp number, also try to include the country code.
Include some text that will prefill the message box in WhatsApp.
Free Tools
WhatsApp Link Generator
Create Whatsapp links to connect to your visitors and customers
Generate WhatsApp to start the conversation
Use a simple WhatsApp link to start a conversation that can lead to more valuable customers
Allow you potential customer to easily contact you without needed your number, click and chat, easy as that.
A great place to add the link is in your Google my business profile, easily connect to potential customers.