When a research output is mentioned in an attention source tracked by Altmetric using a link shortening service, we expand the link in order to reveal the original URL.
We support hundreds of link shortening services, including but not limited to:
bit.ly
t.co
goo.gl
ow.ly
tiny.cc
is.gd
For the full list of supported link shorteners see this page and check out our open source Ruby Library, Embiggen, if you want to find out how it all works under the hood!