Well Acrobat XI became Acrobat DC (why they couldn’t keep it to Creative Cloud (CC) like the other products? I’m sure someone out there has a good reason). DC just means you can now store your PDFs online and easily share with others for collaboration or digital signatures or on mobile devices i.e. a set of integrated online tools/ services that help people better manage documents.
DC now has free e-signatures for the first time – so you can create, edit, read, review, scan, sign, send, and track digital documents securely anywhere.
To help you decide whether or not to upgrade click this link – Acrobat versions.
As always if you require training on Adobe Acrobat just get in touch!