WhatsApp definitely solved a problem when they launched and they did an incredible job, but I'm not sure what I'm missing, what problem were they solving when F

WhatsApp definitely solved a problem when they launched and they did an incredible job, but I'm not sure what I'm missing, what problem were they solving when Facebook bought them That Facebook couldn't? I'm not saying it was a bad investment - I think it was smart, but to me it just seemed like Facebook Messenger and WhatsApp were competitors by the time Facebook bought them.