How to Send Bulk Messages on WhatsApp? | WhatsApp Marketing

2 weeks ago
authkey
4 minutes

Sending bulk WhatsApp messages allows businesses to reach thousands of customers instantly for promotions, updates, reminders and notifications.

Here’s a complete step-by-step guide to send bulk WhatsApp campaigns.

Step 1: Get WhatsApp Business API Access

Signup on Authkey

Create a new account or log in to your existing account.

Start WhatsApp Onboarding

Get Official WhatsApp Business API in 10 minutes.

If you already have a WhatsApp Business account with Authkey, skip this step. 

Step 2: Create & Get Template Approved

Authkey requires pre-approved message templates for outbound bulk messaging.

Step by Step Guide to Create & Get Template Approved

Step 3: Upload Contact List

Prepare your contact database:

Upload contacts via:

  • Upload CSV file
  • Manual entry

Step by Step Guide to Create / Upload Contact List for Campaigns

Step 4: Create a Campaign

Navigate to Campaign → Create Campaign in your Authkey Dashboard.

Campaign Details

Fill in the Campaign Details

Complete the following fields carefully:

  • Choose WhatsApp as your Campaign channel.
  • Select the country code based on the country you are running the campaign in.
    • For India, select 91.
  • Choose your onboarded WhatsApp number from the dropdown list.
  • Campaign Type: Select Normal Campaign.
  • Campaign Name: Provide a clear and identifiable name for your campaign (for example: Holi_Promo_2026).
  • Assign Agent: Since WhatsApp campaigns support two-way communication, select the agent who will handle and respond to incoming customer replies.

Once all details are filled correctly, click Next to proceed to the next step.

Image show filling WhatsApp Campaign details in Authkey dashboard
Image show filling WhatsApp Campaign details in Authkey dashboard

Choose Audience

You can add your audience using any of the following methods:

Copy & Paste Numbers: Directly copy and paste the mobile numbers into the provided field.
Select from Contact List: Choose an existing contact list from the dropdown menu.
Upload CSV File: Upload a CSV file containing your contact numbers.

Make sure the file format matches the required sample format and includes the correct mobile number column.

Once your audience is selected or uploaded successfully, click Next to proceed.

Learn More: How to Create/ Upload Contact List for Campaigns?

Image Shows the Choose Audience to Send the campaign on WhatsApp in Authkey dashboard
Image Shows the Choose Audience to Send the campaign on WhatsApp in Authkey dashboard

Campaign Template

In this step, you need to select the approved WhatsApp template that will be sent to your audience.

Select Template

  • Choose the required WhatsApp template from the dropdown list.
  • Only approved templates will appear in the list.

Preview Template

  • Review the selected template message in the Preview section.
  • Ensure the content, variables ({{1}}, {{2}}, etc.), buttons, and media (if any) are correctly displayed.

Important:
If you have not created or received approval for a template yet, please complete Step 2: Create & Get Template Approved before proceeding with the campaign.

Once the correct template is selected and verified, click Next to continue.

Image Shows the Select WhatsApp Template in Campaign in Authkey dashboard
Image Shows the Select WhatsApp Template in Campaign in Authkey dashboard

Schedule or Send Instantly

Before launching your campaign, carefully review all the campaign details including channel, audience, template, and assigned agent.

Send Campaign Instantly

If you want to start the campaign immediately:

  • Verify all the details are correct.
  • Click on Start Campaign.

The campaign will begin processing within seconds.

Schedule a WhatsApp Campaign

If you want to send the campaign later:

  • Enable the Campaign Schedule option.
  • Select your preferred date and time.
  • Click on Start Campaign to confirm the schedule.

Your WhatsApp campaign will automatically start at the scheduled time.

Image Shows the Campaign scheduler or to start campaign window in Authkey dashboard
Image Shows the Campaign scheduler or to start campaign window in Authkey dashboard

Step 5: Track Campaign Performance

Track the following important insights:

Delivered Messages – Number of messages successfully delivered to recipients.

Read Rate – Percentage of users who opened and read the message.

Click-Through Rate (CTR) – Number of users who clicked on links or CTA buttons.

Replies – Incoming responses from customers (for two-way campaigns).

Failed Messages – Messages that were not delivered due to invalid numbers or other issues.

Download Reports

You can download detailed campaign reports for analysis, record-keeping, or sharing with your team.

Use these analytics insights to:

  • Improve targeting
  • Optimize message content
  • Increase engagement rates
  • Refine future WhatsApp campaigns
Image Shows the WhatsApp Campaign Report in Authkey dashboard
Image Shows the WhatsApp Campaign Report in Authkey dashboard

By using the WhatsApp Business API through Authkey, you can send bulk campaigns, automate communication and increase conversions.