Older, richer, more patient buyers
For furniture, building materials, cars, plots of land, generators and school admissions, Facebook is where the buyer with money is. They will message a page before they call a number, and they expect a reply the same day.
One page, several branches
Route messages by the area a customer mentions, so the Ikeja enquiry reaches the Ikeja manager. Each branch sees only its own chats, while you see everything and the response times of each.
Your page is an asset, not a noticeboard
Response rate badges, review ratings and reply speed all affect how your page performs. Answering inside minutes keeps the "very responsive" badge, which is free credibility on a page any buyer can compare against three competitors.
Keep the history when staff leave
When the person running the page leaves, their phone leaves with the conversations. Everything in DMly stays: contacts, notes, quotes sent, payments collected. Handover becomes a login change, not a crisis.