Go to Marketing and you will see the screen below
Click on the "All clients " box.
On the next screen , click "Visited within a time range"
Select the date range you are looking for by clicking the "From date" and then clicking the start date before choosing your "to date" which is the end date of your range.
This will give you a summary which you can click 'Done" to see a list of those clients in that date range.
Write your own message telling your clients what they need to know. Don't forget to add your name at the end and a phone number for the business.
Send! You will be advised at this point the cost for sending this message to your clients and this will be added to your next bill.