Dead simple. They're just single words or phrases that make it easier for you to get around the site.
Every time we add a new news story, review or answer we tag it. That is, we add words and phrases to describe it. This automatically ties the new page to anything else with the same tag.
Click on any phrase in the tags box and you'll automatically be shown everything else on the subject. Try it - click on "site help" on this page to see what we mean.
You can also click on author's names like Anthony, Petra, Gary or me to see everything we've written.
Finally, try the tags button on our nav bar at the top of every page and you'll see a list of everything we've ever written about, laid out in alphabetical order.
So, you want to know how to get a six pack? Click on "S" or use the drop down menu and you'll be taken to the S page.
Look down the list and you'll see "Six Pack". Click on it and you'll see all our advice. Nice, huh?