To leave a tip for your Instacart shopper, you can do so through the Instacart app or website after your order has been delivered. Instacart typically suggests a default tip based on the total of your order, which you can adjust according to your preference. After the delivery, you should receive a notification prompting you to rate your shopping experience and leave a tip. You will have the option to choose a specific percentage or enter a custom amount. It is important to remember that tipping your shopper is a way to show appreciation for their efforts in providing excellent service, especially considering they handle the selection and delivery of your groceries. If you would like to see specific instructions or additional information, you might find it helpful to look on the current web page for any tips regarding the process.