After brief continuous fire Moze starts stacking a Buff.
The Buff continuous stacking without firing your weapon.
The Buff resets when you Reload, swap Weapons, or with the first shot after a firing break.
This means after firing your weapon you can stop and the Buff continuous stacking.

Buff:

• ‍‍Weapons, Grenades, and Melee get up +100% Bonus Corrosive Damage (7.5% per second).
• Weapons, Grenades, and Iron Bear get up to 100% Bonus Splash Damage (2% per second).
  Basically a hidden Blast Master!

‍Farming note: The Skill "Click, Click..." is an exception to other boosted Skills.
It can't have more than +1.