WhatsApp converts better than any social network — and punishes faster than all of them. It is the most personal app there is, and an unrequested message there annoys in a way a feed post does not.
A deal group you built
People who join of their own accord want to receive. That is the whole difference between promotion and spam. A group of 200 people who chose to be there is worth more than a list of 2,000 scraped contacts.
Make it clear in the description what the group is. Filter: a group that sends everything becomes a muted group.
Status
Only people who already have your number see it, and it intrudes on nobody. It works well for one offer a day, with a real photo and a sentence explaining why.
Broadcast lists: carefully
They only reach people who have your number saved, which limits them naturally. Use them with people who already bought or asked. Blasting contacts who never opted in leads to blocks, and a volume of blocks takes the number down — losing the number your business runs on is hard to undo.
What WhatsApp does not do
It talks to people you already reached. It does not bring new people. For someone new to find you, you have to be where they search — and that is search.
A page of yours with your recommendations, published across a network of search sites like Magneth, is what feeds the group with new people instead of recycling the same contacts.