Forget the "social." Pinboard's utility is that it's a website that privately stores all my bookmarks, so I can access them on any computer. You can add tags to help you organize your bookmarks, plaintext notes or descriptions of bookmarks, and so on.
I find it extremely useful for saving the results of internet deep dives, where I might end up with ten tabs open that I want to save to revisit later.
I use the the bookmarklet (https://pinboard.in/howto/#saving) and save one page at a time. It only takes a moment so I've never felt the need to automate it, but I'm sure one could.
I find it extremely useful for saving the results of internet deep dives, where I might end up with ten tabs open that I want to save to revisit later.