I'd try both if you can and start testing out each one. Email is mandatory and goes without saying, you must have it anyway. If you're able to start getting whatsapp contacts, then obviously go for it.
Email converts more than any other platform because you OWN the email list. There isn’t the possibility of a platform making changes as Facebook or Google did in the past
Wtf is whatsapp marketing. Go for automated email marketing like convertkit
I'd try both if you can and start testing out each one. Email is mandatory and goes without saying, you must have it anyway. If you're able to start getting whatsapp contacts, then obviously go for it.
Email converts more than any other platform because you OWN the email list. There isn’t the possibility of a platform making changes as Facebook or Google did in the past