This is the 17668th most frequent Russian word.
увидишь
"You will see."
Here 'увидишь' is used in its direct sense, meaning 'you will see' as in observing something visually in the future.
Когда ты приедешь в мой город, ты увидишь множество красивых зданий.
When you come to my city, you will see many beautiful buildings.
In this context, 'увидишь' pertains to noticing or observing a process or an event, emphasizing attentiveness.
Если ты будешь внимательным, ты увидишь, как распускаются цветы.
If you pay attention, you will see how the flowers bloom.
Here 'увидишь' metaphorically implies understanding or realizing something in the future rather than literally seeing.