What is Facebook’s 24+1 rule ?

Facebook messenger is one of the best Personalised engagement messenger .For getting success in this you have to keep a lot of things and tactics in mind.One such is 24+1 rule. So basically 24+1 is rule according to which ,the time/day when a person opts in , in your message service you can send endless promotional messages that day. But after that you can only send one promotional message in a day and endless non promotional messages .So the 24+1 rule says that if you send a message and you get some kind of engagement through it you will again have endless promotional messages for that day. This rule is created for avoiding spamming your customers even when they are not interested in your product that is when there is no engagement. And you must keep this rule in mind ,Facebook can takeaway some of your privileges if you break the rule and in some cases even ban the whole page.