A shortened URL takes up less space and keeps your text tidy. For example, using aliexpi.com, you can convert https://aliexpress.com/item/100-original-New-2015-Adidas-men-s-shoes-S79452-Running-sneakers-Unisex-free-shipping/32488784325.html?spm=a2g0v.search0603.3.52.c7e612ec97vNdX&algo_pvid=e74e2b58-e3db-4705-b00a-8baf673f54bc&transAbTest=ae803_2&priceBeautifyAB=0 to aliexpi.com/yak. It's easier to read and easier for someone to copy and paste or type.