To pull themselves out of their feudalism economy and increase their wealth and power. there were a lot of second and third sons becoming merchants after their older brothers inherited the land, and these merchants had more to trade than what people inside europe needed so they increased their trade outside their nation.
Positive effect:
Benefited the people at the top.
A flexible system making power and decision.
Allowed stability and security.
The lord had a unique relationship with his vassals.
Created an obligation for the powerful to help and protect the weak.
Negative effect:
90% of population were were commoners or peasants.
Serfs has no say in that time.
The kings were not in direct control of all their subjects.
Relied on gaining status through work and power.
I am not a 100% sure, but I think it would be the speaker of the house. Hope this helps