Ganking/Roaming wins games

For those of you that doesn't already know I main top lane. I recently realized the importance of ganking, and that it wins games. So I play Jayce a lot and and after I gain an advantage(getting a kill ) on the enemy  champion they end up just hugging the turret and I can't seem to kill them most of the time. Recently I decided to focus more on roaming when I can and whenever the enemy mid pushes I push my lane and go for a gank. This allowed me to get a lot of kills sometimes even two at the same time because the enemy jungler was ganking. Overall roaming increases your presence in the game and helps your team win the game opposed to just denying the enemy a few creeps.