Have you have ever seen an image comparison where you can slide to the left or the right to see the before and the after?

If you want to display something like that on your website, you can install the"TwentyTwenty" Plugin.
The plugin has a newshortcode, [twentytwenty], enter this in your text editor and you can add two images to compare.

When you can benefit from this feature, it is really a cool thing on your site...