The theme is based of a theme called “responsive”
This is how it looks on the site for me
https://prnt.sc/ogzeji
Should look crisp like the image purchased
https://prnt.sc/ogzezp
If you visit this page
http://146.66.70.36/~summitpl/knowledge-insights/
you will see the thumbnail images are slightly blurry
Also if you check the post page the featured image is slightly blurry too
http://146.66.70.36/~summitpl/5-steps-for-taking-care-of-mom-and-dad/
The images were uploaded from hi-res images bought off shutterstock or elsewhere.
Thanks! I tried this
Hi there, you can open functions.php file and locate
set_post_thumbnail_size( 665, 435, true );
then change it to
set_post_thumbnail_size( 800, 533, true );
And it is still blurry
