The first column should contain the phone numbers of the recipients. The rest of the columns should contain the variables you want to use in your template. Please note the single quote before the phone numbers, this is to prevent excel from treating the phone number as a formula.
If you wish you can send your broadcast immediately by clicking on New Broadcast. If you want to schedule your broadcast for a later date or add tags to the conversation, click on See advanced options and select the date and time you want to send your broadcast and the tags to be added.
By default we do not interrupt ongoing Inbox conversations (conversations that are not marked as closed) if you wish to send the broadcast even if the conversation is not closed on your Inbox enable the option under See advanced options.

