Our detectives are back with the following intel on this WordPress site
The site is using the Insido theme by Theme Junkie .
We could identify 2 plugins (there might be more) - Yoast SEO and Smush – Lazy Load Images, Optimize & Compress Images
Insido is a premium flexible and responsive Magazine WordPress theme. It is perfect for online magazines websites, news websites, personal blogs or community blogs.
Compress images & optimize images with lazy load, WebP conversion, and resize detection to make your site load amazingly fast.