Effect

From Wiki001

Effects are used for different things. These Include: ammunition for weapons, clouds&rain, and other things, such as blood and fire, to give your game a touch of life!

Effects make your games more realistic. For a Weapon that shoots you need an effect as the bullet and you can add an impact effect, so if you wanted to make a shotgun with explosive bullets, you would could choose 'SPAS-12 Bullet' for 'use Effect' and 'explosion' for impact effect so when the SPAS-12 Bullet hits an explosion will appear where the Bullet hits.

See Dynamic Object for its use in maps.

Effects are also used to add an extra flourish in your project. e.g. your character is a fire necromancer, you can add a trail of fire behind as he walks. Theres no real limit to what you can discover with effects. You just need to discover it. But sometimes, doing that can be hard. It is suggested that you find something you want to accomplish, and accomplish it. such as player made fires.