To install the application, you simply need to follow the steps mentioned below:
1.Search for the application-Simply  Cartbooster on the Shopify Store.
2.Provide your Shopify Store URL.
3.Click on Login.
4.You need to subscribe to the basic application plan.
5.The application is installed.
6.Go to settings enable Simply Cartbooster.
7.Create upsell and utilize the application.