Plain-English definitions of the WhatsApp Business API terms every business runs into — pricing, messaging, onboarding and more.

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24-Hour Service Window

The period after a customer messages you during which you can reply freely without a template.

B

Broadcast

Sending an approved template message to many opted-in contacts at once.

Business Solution Provider (BSP)

A Meta-approved company that provides businesses access to the WhatsApp Business API, plus the dashboard and tools around it.

C

Click-to-WhatsApp Ads (CTWA)

Facebook and Instagram ads that open a WhatsApp chat instead of sending the user to a landing page.

Conversation-Based Pricing

How Meta charges for WhatsApp messaging — historically per 24-hour conversation, now moving to per-message pricing by category.

G

Green Tick (Official Business Account)

The green verified badge Meta grants to notable businesses on WhatsApp.

M

Message Categories

The four types Meta uses to classify and price WhatsApp conversations: marketing, utility, authentication and service.

Messaging Limits (Tiers)

A cap on how many unique customers a business can message in 24 hours, which rises with good quality.

O

Opt-in

A customer's explicit permission for a business to message them on WhatsApp.

Q

Quality Rating

A health score Meta gives each WhatsApp number based on how customers react to its messages.

S

Shared Team Inbox

One WhatsApp number that multiple agents handle together, with assignment, notes and tags.

T

Template Message

A pre-approved message format businesses use to start a WhatsApp conversation or send notifications.

W

wa.me Link

A short click-to-chat link that opens a WhatsApp conversation with a business, optionally with a pre-filled message.

Webhook

An automatic notification your systems receive when something happens on WhatsApp, such as an incoming message.

WhatsApp Business API

The official programmatic way for medium and large businesses to send and receive WhatsApp messages at scale.

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