The fixed limits you may run into, from WhatsApp rules to call length.
VideoLimits
WhatsApp rules
Rule
What it means for you
24-hour window
You can send free text to a buyer only within 24 hours of their last message. Outside that, only an approved template can be sent. Campaign opening messages, follow-ups and your sales team's messages are templates for this reason.
Template approval
Every template must be approved by Meta before it can be sent. Changing the wording, header, footer or buttons of an approved template sends it back to review.
Template buttons
Up to 3 quick-reply buttons.
Template body
Must not start or end with a blank.
Media the agent can share
Type
Limit
Images (JPEG, PNG)
5 MB each
PDF documents
100 MB each
Caption
1,024 characters
Videos
Shared as a link, not uploaded
The agent sends at most one item per reply, at most 6 items per lead in total, and at most 2 per hour. It never sends the same item to the same lead twice. Media is shared on WhatsApp only, never on calls.
Campaigns
Setting
Default
Limit
Speed
15 messages a minute
Set per campaign
Daily limit
None
Set per campaign
Follow-ups
Two, 48 and 120 hours after the first message
Timing set on Settings; each campaign picks the message, or none