Tags give the ability to mark specific points in history as being important
ubuntu/5.4.1+dfsg-4ubuntu2
5.3.2+dfsg-4+deb8u1 stable-proposed-updates; urgency=medium
5.3.2+dfsg-4~bpo70+1 wheezy-backports; urgency=medium
5.3.2+dfsg-3~bpo70+1 wheezy-backports; urgency=medium