how do companies add weight to their products - SERP Analysis

https://boards.core77.com/t/product-weight-and-perceived-quality/28107

https://www.sciencedirect.com/science/article/abs/pii/S0022199620300957

https://www.reddit.com/r/TrueAskReddit/comments/k50xn2/why_do_we_associate_things_being_heavier_with/

https://tevello.com/blogs/shopify-guides/how-to-add-weight-to-your-shopify-products-and-enhance-shipping-efficiency

https://www.worximity.com/blog/why-weight-control-in-manufacturing-matters-and-five-key-steps-to-manage-it

https://www.quora.com/How-do-companies-use-packaging-and-product-shape-to-create-the-illusion-of-getting-more-value-and-why-does-it-work-so-well-on-consumers

https://x-series-support.lightspeedhq.com/hc/en-us/articles/25534193525403-Adding-weight-and-dimension-to-your-products

https://support.bigcommerce.com/s/question/0D5TS00000SQGcS0AX/add-weight-and-dimensions-to-a-custom-product%3Flanguage%3Den_US

https://community.squareup.com/t5/Square-Online-Discussion/How-do-we-put-a-weight-on-the-product-so-correct-postage-can-be/m-p/191543

https://community.shopify.com/t/why-is-product-weight-suddenly-required-to-edit-or-create-products/148161