He can artificially «tag» his artificial proteins and see how cells handle them differently with different tags. (en.hdbuzz.net)
On each video, use a different description, with different keywords targeted to different niche's and use different tags. (smallbusinessesdoitbetter.com)
Your feline friend's ID collar should have a few different tags: one with your contact info, and one tag for each of her vaccinations. (petcentric.com)