We built an AI Integrated 'Assistant' for one of our clients which has gone down pretty well. They used WA for customer-service and product update broadcasts, but had to do everything manually. We suggested building an AI Assistant to be integrated into their whatsapp and it's been a hit with customers. They get instant responses in a conversational but professional tone, 24/7.
WA is a very powerful tool for the right business. You are bang on when it comes to not all customers want regular updates, so you definitely need to have them subscribe to this as you would an email newsletter.
To answer your question on what makes WA an effective (or in effective) tool for business I'll summarise my opinion below:
Benefits:
- Instant communication
- Global reach - one of the (if not the) most widely used communication apps in the world.
- Cost-effective
- Rich media sharing
- Personalised and efficient interaction with customers
Disadvantages:
- Unsolicited messages (customers must opt in/out of regular updates)
- Risk of spam - constant updates may paint a spammy image of the business in the customer's eyes.
- Professionalism issues - not the best communication method for all industries
Just my opinion and experience with WA! We use it on a daily basis within my business, I love it. Hope this helps.