What is Splatfest?

The Splatfest is a festival within Splatoon and Splatoon 2.

It's basically an event, where you choose one side or another, then fight against people from the other side.

Participation is rewarded with Super Sea Snails. The amount you receive depends on whether your team won, and how much experience you collected during the festival. The amount ranges from 2 to 24 per Splatfest.

Super Sea Snails are used to increase the number of slots on your gear or reroll all abilities on a specified piece of gear.

The only other way to collect Super Sea Snails is to level up after reaching level 30, with each level up awarding a single Super Sea Snail (for a maximum of 20 in total).