An Instagram account is recommended but not required to run ads on Instagram. However, if you don't add an Instagram account to your Business Manager or through your Page settings, there are a few things that you'll need to bear in mind:

• Your Facebook Page's name and image will be used on your Instagram ad so that people can easily identify your business.
• You won't be able to respond to comments on your ad.
• Your Instagram handle will be your Facebook Page's name. It will be greyed out and won't be clickable. If your Facebook Page's name exceeds the Instagram handle character limit, it will be truncated with "..."

* Nguồn: Facebook