What is the difference between using “Seeds” and “Move to Top?”

Utilizing seeds and/or moving references to the top for screening can be used to help build the prioritization model more quickly. The main difference is that seeds will not be screened whereas references moved to the top remain in the project and will be screened. 

It is not required to use either seeds or move references to the top for your project, and the prioritization model will still be built without use of a seed set or moving references to the top.