WhatsApp makes use of a "store and forward" system for exchanging messages amongst two consumers. Each time a person sends a message, it can be saved on the WhatsApp server, which tries to forward it to the addressee, and regularly requests acknowledgement of receipt. Adem AY/Unsplash While it’s much from https://eduardobwoft.blogoscience.com/34462606/5-essential-elements-for-whatsapp