Have you ever changed themes and found out that all of your images are broken? Have you noticed that without proper image sizes or featured images your site looks out of the place?
This happens because when you switch your theme, the thumbnails do not change sizes with the theme. Pixel perfect thumbnails can make your website get more attention from your readers and provide a great user experience to your readers. [Also read: Best WordPress Themes for Bloggers]. Proper thumbnails with the help of WordPress Thumbnail plugins can encourage your readers to get engaged and spend more time on your website. More time on your website eventually contributes to reduce your bounce rate and increase the conversation rate.