1. Open Google Sheets > add-ons menu from Google Sheets
Alternatively, click the following button to install MailMerge:
2. Type MailMerge in the search bar
3. Click on + FREE to install the add-on
4. Accept the authorizations
Once MailMerge has been installed, two pop-ups will appear on your spreadsheet. You should now see MailMerge under the add-ons menu. Now, close the two pop-ups and start working on your first campaign.