How to make glow effect in illustrator

Illustration Tutorial

HOW TO MAKE GLOW EFFECT In Illustrator.

Start with a Shape

I am using a Circle, you can do this with any Shape.

Offset Path.

Object > Path > Offset Path Offset : 15px

Add Gradient.

Radial

Add Blur.

Effect > Blur > Gaussian Blur Radius : 20px

Reduce Opacity.

> Opacity : 50%

Align.

Original on top.

It's Done

Play Around.

With Shapes, Opacity and Blur to make more effects.