I love Pinterest as a means of bookmarking sites that I find.
It allows me to categorize pages, move things from one category to another with ease.
I save many recipes I have 'to try' and 'made' categories for different types of food. In review the recipe in the comments after I have made it.
I like too that I can easily post items from Pinterest share with friends on Facebook.
I have over 900 'Pins', that would be tough to keep track of using regular bookmarks. I can also see my pins on all my devices, whereas book marks are limited to just one device.