WhatsApp deliberately limits what you can send outside of an active conversation, to protect users from spam. Ariyes handles this with two modes.
Manage your approved templates under Settings → WhatsApp → Templates. When you build a WhatsApp broadcast, you either choose a template and map its variables to contact fields (like first name), or write freeform if the window allows. Because template approval is controlled by Meta, prepare and get your key templates approved ahead of a campaign so they're ready when you need them.