The Tower Pressure score under Objectives measures your application of pressure on the map by damaging towers and destroying them. This score is only available for the Top, Mid, and ADC roles.
Tower Pressure is a green score. This means that the higher the score, the better your performance (try to keep as high as possible!).
Dmg Dealt to structures: The average amount of damage you inflict on enemy structures per game.
Tower kill participation: The average percentage of tower kills you participated in for the total number of turrets that your team destroyed.