Path on Lightning record pages
Key Takeaway
A path turns the values of one picklist into steps for one object and one record type. Activating a path does not put it on a page, so you also need to add the Path component to the Lightning record page.
Path is a Lightning Experience feature that guides users through the steps of a business process, such as working an opportunity from a fresh lead to a closed deal. At each step, you can highlight key fields and show Guidance for Success so users stay focused and gather complete data.
What a path is built on
A path is built on one object, one record type, and one picklist. Each picklist value becomes a step. For most objects, the steps follow the order of the values in that picklist. Paths work with many standard picklists and with custom picklists.
Each object can have one path per record type. There is no limit to the number of paths in an org.
If every record type on an object already has a path...
You must create another record type before you can create another path.
If you delete a record type that has a path...
The path is deleted too.