During the early phases of the product development LIFECYCLE, it really helps if the scrum team is made part of the DISCOVERY process. You should understand that AGILE talks about the early involvement of the teams with the stakeholders so that both parties are on the same PAGE in regard to the development. Let’s look at some of the advantages of early involvement:

• The development teams identify the technical challenges in implementation early in the process, hence, can help in reforming the requirements along with the customer.
• The team along with the product owner also start sharing a common understanding of what is to be built. Sometimes, the teams can help the product owner in identifying the requirements which might have been missed.
• They share a mutual understanding of what is to be built. It also helps the teams to stay committed and confident, they tend to build an ownership of their work and most importantly it boosts up the morale of the team.

To facilitate this, the scrum master can start involving the teams in early discussion of the product where the requirements are still at a high level. The team TOGETHER with the product owner can build up the product backlog.