Affiliates are notified of sales and payouts as and when they happen for their referrals. However if you wish to send them a quick update regarding your store, or maybe send them a newsletter, you can use the quick email feature.
How to use
Open the app dashboard
Click on Quick Email option in the sidebar
Click on Compose Email
Select partners from the dropdown, enter your subject and write your email content
Click Preview Message to preview how the email would look link
Then click Send Message to send it to your affiliates.
This way you can keep your affiliates engaged and have them promote your products regularly