Tell them exactly what to do
'Get a free quote on WhatsApp' beats 'Contact us'. Say the action and the benefit together.
Name the action and the benefit together — 'Get a free quote on WhatsApp', not 'Contact us'.
Reduce the risk
'No obligation', 'free', 'reply in one hour' — small reassurances remove the fear that stops people acting.
Make it easy
Put the action within reach: a tappable button, a WhatsApp link, a short form. Every extra step loses people.
Key takeaway
Say exactly what to do, remove the risk, and make it one tap — that's a CTA that gets clicked.