Hey guys,
I checked and I see what you mean,
In order to ensure pages will load fast, CoBlocks uses image thumbnails to ensure that an oversized image would not slow down the load time of your website or create the image scaling issue that is bad for SEO.
Now, sometimes thumbnails that are scaled by your theme can lose some quality in the process.
This is a bummer, but those images should be rescaled and uploaded at the same location as the original thumbnails. The results will depend mainly on the scaling tool used for images.
So for instance, if the img-300×150.jpg file that loads on mobile devices is located in the wp-content/uploads/2020/10/01 folder and you notice that quality is not satisfactory, you may rescale it.
Find the img.jpg which is the base file from which the image has been generated and try scaling it using an image editing software to the dimensions specified(300 x 150). Then replace the image on its location and depending on the option you selected for scaling image manually you should experience some better results.
I hope this helps, have a nice day,
Andrija
