Working with stakeholders to create a customer journey map that improves conversions and running reports on the value of cart items and time since the last activity are two tactics that a Solution Architect could recommend to understand how to optimize the checkout process. A customer journey map is a visual representation of the steps and interactions that a customer goes through when engaging with a company or brand. It can help identify pain points, opportunities, and best practices for improving conversions. Running reports on the value of cart items and time since the last activity can help analyze the shopping behavior and preferences of customers, as well as identify potential reasons for cart abandonment.