Explanation
A sales process is a set of stages that an opportunity goes through as it moves from creation to close. It can be customized by administrators to match different business models or product lines within an org. Creating a new sales process can help Dreamhouse Realty define a different set of stages for its new home concierge offering that is unlike anything the company has offered in the past and follows a different business model.
Creating a quick action, a new approval process, or a new opportunity product are not solutions for creating a customized sales process; they are used for different purposes such as creating records, approving records, or adding products to opportunities. References:
https://help.salesforce.com/s/articleView?id=sf.customize_salesprocess.htm&type=5