Product Owner (PO) is responsible for maximizing the value of the product created by a Scrum Development Team.
A Tech Lead (or a technical lead) is a senior leading role for a software engineer.
Meaningful Meetings are spin-off on the classical, endless, and pointless meetings all people know and dislike.
Team Culture is not dependant on or created by an individual member's personality, but rather built on how the team collectively functions.
A vision's purpose is to unify and motivate people and teams towards achieving an ultimate goal.