If you didn't know eyeshadow application should be based on eye type/shape then you've probably been getting it wrong and should watch this tutorial.
Eyeshadow application feels like the easiest make-up routine but its not.
Eyeshadow application should be according to eye type that way it comes out flattering part from getting a hang on proper blending and colour mixing/blending.
There are different ways to apply eyeshadows to the eyes ranging from strictly applying to the entire lid only, cutting crease to go slightly higher, the crease only, the waterline, highlighting the brow bone and more.
Eyeshadow application is about creativity but its important to master what works for the eye type/shape, from hooded to down turned, almond shaped, deep set, close set eyes and more, its important to know what way works for what eye shape.
If you've been ignorantly applying your eyeshadow, watch this guide.