Sticky Cards
Navigate to https://app.stickycards.co/
Click on "Cards" here
Click "Open" underneath your Sticky Card.
Click "Customers"
Click the "Search" field and type your customer's name
Select your customer
Click "Send push"
Select the specific card for your location
Type in the desired "Message" in the message box
Click "Send" to immediately send the message, or use the "Schedule" checkbox to select a particular time