The banner shadow option in cookie consent app helps to give the banner a eye-pleasing look. You can change the setting according to your needs. The shadow guideline banner in the setting peg can help you a lot. Please go through the shadow guidance. 

Shadow Guidance:-

1. Horizontal Shadow or h-offset:- The horizontal offset of the shadow. A positive value puts the shadow on the right side of the banner, a negative value puts the shadow on the left side of the banner.

2. Vertical Shadow or v-offset:- The vertical offset of the shadow. A positive value puts the shadow below the banner, a negative value puts the shadow above the banner.

3. Blur:- Blur value represents how much blur effect will be applied on the banner shadow.

4. Spread:- Spread Value represents how much the shadow of the banner will spread

Note:- For first two styles Minimalistic Full Width, Minimalistic Full Width With Icon shadow effect will work best if the position is set either top right or bottom right. For rest of four style it will work best when relative position is not set as 0px.