How can I improve the visual stabiltiy

My store is not fully launched yet, but the score for visual stability has been very high. I wonder how would I go about fixing it and I am new to e-commerce. So I am still on the learning curve of how to go around fixing and creating the website.

Do I need to know how to do coding for CSS and JavaScript? That I have no idea how to do.

You can reach me by email at Glamorous.Pearls@yahoo.com, is it good?

I have received it yet, I will wait for it.

I have not received it yet, I mean.

Could I have your g mail?