noun, noun or participle which takes 'suru', transitive verb
raising the standard; raising the floor; improving the bottom
Used for improving the lowest level or weakest part of a group, system, or economy, rather than just raising the top.
政府は最低賃金の底上げを目指している。
The government aims to raise the minimum wage floor.
チーム全体の底
We need to improve the overall level of the team from the bottom up.