Hello,
As you can see here – https://gtmetrix.com/reports/shahjalalpe.com/x0QP6o1H , you do not need to load full image size here – https://prnt.sc/ucdsmi https://i0.wp.com/shahjalalpe.com/wp-content/uploads/2020/08/Realme-Logo-JPG.jpg – it is too big, just set size, for example – https://prnt.sc/ucdt8y
About images of products https://prnt.sc/ucdtuo , go to Appearance > Customize > WooCommerce (Shop) > Product images > Thumbnail Width > 255 https://xstore.helpscoutdocs.com/article/89-product-images
Regards