For example, if you placed an image on your site and there is a lot of space around it, you might have transparent pixels surrounding your image-which can be removed. Generally, if the image on your website doesn’t look right or seems too large you might need to adjust it. How do I know if my image contains unnecessary pixels? Plus, people love photos! But, a lot of times, the images they are using are too big or contain unnecessary transparent pixels. They bring the website life and make it visually appealing. Images are an essential aspect (most of the time) to any website.