How many broadcast message can a WABA number send everyday?
Messaging limits determine how many unique users or phone numbers your business can send messages. This includes new conversations as well as existing conversations with users. The messaging limit does not limit the number of messages your business can send, just the number of users you are trying to message. It also does not apply to messages sent in response to a user-initiated message within a 24-hour period.
Facebook has Tier levels that allows WABA to send messages. A business starts in Tier 1 when it registers its phone number (250 customers/day).
Tier 1: Allows your business to send messages to 250 unique customers in a rolling 24-hour period.
Tier 2: Allows your business to send messages to 1K unique customers in a rolling 24-hour period.
Tier 3: Allows your business to send messages to 10K unique customers in a rolling 24-hour period.
Tier 4: Allows your business to send messages to 100K unique customers in a rolling 24-hour period.
An unlimited number of business-initiated conversations in a rolling 24-hour period.
To increase the tier, there are ways that must be done, namely sending messages to a unique number.
For example, Once your business phone number's messaging limit has been increased to 1,000, we will determine if it should be increased further according to the following criteria:
Your business phone number is connected
Your business phone number quality rating is Medium or High
In the last 7 days, your business has utilized at least half of your current messaging limit
If this criteria is met, we will increase your phone number's limit by one level, 24 hours later. If its quality rating has been set to Flagged for the last 7 days, however, we will decrease its limit by one level, immediately.
For more information, you can refer to this link:
https://developers.facebook.com/docs/whatsapp/api/rate-limits/
https://developers.facebook.com/docs/whatsapp/messaging-limits/