In the context of research, searching for anything on the internet is terrible now - especially with the willingness of search engines to simply make up, ad the run with, a concept from the query.
And if the thing you need was created more than a few years ago - especially if it was more ephemeral than a published paper (e.g. workshop slides, a blog post, uploaded seminar slides etc.) - you will almost certainly need to access an archived version of it because the original is long gone.